diff --git a/go.mod b/go.mod
index d3a578e..09c7819 100644
--- a/go.mod
+++ b/go.mod
@@ -41,7 +41,7 @@ require (
 	github.com/veraison/go-cose v1.1.0
 	go.uber.org/automaxprocs v1.5.3
 	go.uber.org/zap v1.25.0
-	golang.org/x/sync v0.1.0
+	golang.org/x/sync v0.7.0
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20230822172742-b8732ec3820d
 	google.golang.org/grpc v1.57.1
 )
@@ -97,10 +97,10 @@ require (
 	github.com/sirupsen/logrus v1.8.1 // indirect
 	github.com/stretchr/objx v0.5.2 // indirect
 	go.uber.org/multierr v1.10.0 // indirect
-	golang.org/x/crypto v0.21.0 // indirect
-	golang.org/x/net v0.21.0 // indirect
-	golang.org/x/sys v0.18.0 // indirect
-	golang.org/x/text v0.14.0 // indirect
+	golang.org/x/crypto v0.25.0 // indirect
+	golang.org/x/net v0.27.0 // indirect
+	golang.org/x/sys v0.22.0 // indirect
+	golang.org/x/text v0.16.0 // indirect
 	google.golang.org/genproto/googleapis/api v0.0.0-20230822172742-b8732ec3820d // indirect
 	google.golang.org/protobuf v1.33.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
diff --git a/go.sum b/go.sum
index bcef3bc..0973b70 100644
--- a/go.sum
+++ b/go.sum
@@ -320,8 +320,9 @@ golang.org/x/crypto v0.0.0-20211215153901-e495a2d5b3d3/go.mod h1:IxCIyHEi3zRg3s0
 golang.org/x/crypto v0.0.0-20220722155217-630584e8d5aa/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
 golang.org/x/crypto v0.6.0/go.mod h1:OFC/31mSvZgRz0V1QTNCzfAI1aIRzbiufJtkMIlEp58=
 golang.org/x/crypto v0.19.0/go.mod h1:Iy9bg/ha4yyC70EfRS8jz+B6ybOBKMaSxLj6P6oBDfU=
-golang.org/x/crypto v0.21.0 h1:X31++rzVUdKhX5sWmSOFZxx8UW/ldWx55cbf08iNAMA=
 golang.org/x/crypto v0.21.0/go.mod h1:0BP7YvVV9gBbVKyeTG0Gyn+gZm94bibOW5BjDEYAOMs=
+golang.org/x/crypto v0.25.0 h1:ypSNr+bnYL2YhwoMt2zPxHFmbAN1KZs/njMG3hxUp30=
+golang.org/x/crypto v0.25.0/go.mod h1:T+wALwcMOSE0kXgUAnPAHqTLW+XHgcELELW8VaDgm/M=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
@@ -348,8 +349,9 @@ golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qx
 golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
 golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
 golang.org/x/net v0.10.0/go.mod h1:0qNGK6F8kojg2nk9dLZ2mShWaEBan6FAoqfSigmmuDg=
-golang.org/x/net v0.21.0 h1:AQyQV4dYCvJ7vGmJyKki9+PBdyvhkSd8EIx/qb0AYv4=
 golang.org/x/net v0.21.0/go.mod h1:bIjVDfnllIU7BJ2DNgfnXvpSvtn8VRwhlsaeUTyUS44=
+golang.org/x/net v0.27.0 h1:5K3Njcw06/l2y9vpGCSdcxWOYHOUk3dVNGDXN+FvAys=
+golang.org/x/net v0.27.0/go.mod h1:dDi0PyhWNoiUOrAS8uXv/vnScO4wnHQO4mj9fn/RytE=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -360,8 +362,9 @@ golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20201207232520-09787c993a3a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.1.0 h1:wsuoTGHzEhffawBOhz5CYhcrV4IdKZbEyZjBMuTp12o=
 golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.7.0 h1:YsImfSBoP9QPYL0xyKJPq0gcaJdG3rInoqxTWbfQu9M=
+golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -386,8 +389,9 @@ golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/sys v0.18.0 h1:DBdB3niSjOA/O0blCZBqDefyWNYveAYMNF1Wum0DYQ4=
 golang.org/x/sys v0.18.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.22.0 h1:RI27ohtqKCnwULzJLqkv897zojh5/DwS/ENaMzUOaWI=
+golang.org/x/sys v0.22.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
@@ -401,8 +405,9 @@ golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
 golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
 golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
-golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
 golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
+golang.org/x/text v0.16.0 h1:a94ExnEXNtEwYLGJSIUxnWoxoRz/ZcCsV63ROupILh4=
+golang.org/x/text v0.16.0/go.mod h1:GhwF1Be+LQoKShO3cGOHzqOgRrGaYc9AvblQOmPVHnI=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
diff --git a/grpcserver/grpcserver.go b/grpcserver/grpcserver.go
index 7a5da06..280d52c 100644
--- a/grpcserver/grpcserver.go
+++ b/grpcserver/grpcserver.go
@@ -13,7 +13,6 @@ import (
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/reflection"
 
-	env "github.com/datatrails/go-datatrails-common/environment"
 	"github.com/datatrails/go-datatrails-common/grpchealth"
 	grpcHealth "google.golang.org/grpc/health/grpc_health_v1"
 )
@@ -79,12 +78,11 @@ func tracingFilter(ctx context.Context, fullMethodName string) bool {
 
 // New creates a new GRPCServer that is bound to a specific GRPC API. This object complies with
 // the standard Listener service and can be managed by the startup.Listeners object.
-func New(log Logger, name string, opts ...GRPCServerOption) GRPCServer {
-	listenStr := fmt.Sprintf(":%s", env.GetOrFatal("PORT"))
+func New(log Logger, name string, port string, opts ...GRPCServerOption) GRPCServer {
 
 	g := GRPCServer{
 		name:      strings.ToLower(name),
-		listenStr: listenStr,
+		listenStr: fmt.Sprintf(":%s", port),
 		register:  defaultRegisterServer,
 		interceptors: []grpc.UnaryServerInterceptor{
 			grpc_otrace.UnaryServerInterceptor(grpc_otrace.WithFilterFunc(tracingFilter)),
diff --git a/startup/run.go b/startup/run.go
index 5c3bdfc..16602ec 100644
--- a/startup/run.go
+++ b/startup/run.go
@@ -11,10 +11,10 @@ import (
 	"github.com/datatrails/go-datatrails-common/tracing"
 )
 
-type Runner func(string, logger.Logger) error
+type Runner func(logger.Logger) error
 
 // defers do not work in main() because of the os.Exit(
-func Run(serviceName string, run Runner) {
+func Run(serviceName string, portName string, run Runner) {
 	logger.New(environment.GetLogLevel())
 	log := logger.Sugar.WithServiceName(serviceName)
 
@@ -31,11 +31,11 @@ func Run(serviceName string, run Runner) {
 
 	exitCode := func() int {
 		var exitCode int
-		closer := tracing.NewTracer()
+		closer := tracing.NewTracer(log, portName)
 		if closer != nil {
 			defer closer.Close()
 		}
-		err := run(serviceName, log)
+		err := run(log)
 		if err != nil {
 			log.Infof("Error at startup: %v", err)
 			exitCode = 1
diff --git a/tracing/logger.go b/tracing/logger.go
new file mode 100644
index 0000000..4bb4e5e
--- /dev/null
+++ b/tracing/logger.go
@@ -0,0 +1,7 @@
+package tracing
+
+import (
+	"github.com/datatrails/go-datatrails-common/logger"
+)
+
+type Logger = logger.Logger
diff --git a/tracing/tracing.go b/tracing/tracing.go
index f64e823..b1fe770 100644
--- a/tracing/tracing.go
+++ b/tracing/tracing.go
@@ -5,7 +5,6 @@ import (
 	"context"
 	"fmt"
 	"io"
-	"log"
 	"net/http"
 	"net/textproto"
 	"os"
@@ -16,7 +15,6 @@ import (
 	opentracing "github.com/opentracing/opentracing-go"
 
 	"github.com/datatrails/go-datatrails-common/environment"
-	"github.com/datatrails/go-datatrails-common/logger"
 
 	zipkinot "github.com/openzipkin-contrib/zipkin-go-opentracing"
 	zipkin "github.com/openzipkin/zipkin-go"
@@ -77,13 +75,7 @@ func NewSpanContext(ctx context.Context, operationName string) (opentracing.Span
 }
 
 func StartSpanFromContext(ctx context.Context, name string, options ...opentracing.StartSpanOption) (opentracing.Span, context.Context) {
-
-	log := logger.Sugar.FromContext(ctx)
-	defer log.Close()
-
-	log.Debugf("tracing.StartSpanFromContext: %s", name)
-
-	tags := make(map[string]interface{})
+	tags := make(map[string]any)
 	tags["component"] = "DATATRAILS"
 	options = append(options, opentracing.Tags(tags))
 	return opentracing.StartSpanFromContext(ctx, name, options...)
@@ -129,50 +121,50 @@ func trimPodName(p string) string {
 	return p
 }
 
-func NewTracer() io.Closer {
+func NewTracer(log Logger, portName string) io.Closer {
 	instanceName, _, _ := strings.Cut(environment.GetOrFatal("POD_NAME"), " ")
 	nameSpace := environment.GetOrFatal("POD_NAMESPACE")
 	containerName := environment.GetOrFatal("CONTAINER_NAME")
 	podName := strings.Join([]string{trimPodName(instanceName), nameSpace, containerName}, ".")
-	listenStr := fmt.Sprintf("localhost:%s", environment.GetOrFatal("PORT"))
-	return NewFromEnv(strings.TrimSpace(podName), listenStr, "ZIPKIN_ENDPOINT", "DISABLE_ZIPKIN")
+	listenStr := fmt.Sprintf("localhost:%s", environment.GetOrFatal(portName))
+	return NewFromEnv(log, strings.TrimSpace(podName), listenStr, "ZIPKIN_ENDPOINT", "DISABLE_ZIPKIN")
 }
 
 // NewFromEnv initialises tracing and returns a closer if tracing is
 // configured.  If the necessary configuration is not available it is Fatal
 // unless disableVar is set and is truthy (strconf.ParseBool -> true). If
 // tracing is disabled returns nil
-func NewFromEnv(service string, host string, endpointVar, disableVar string) io.Closer {
+func NewFromEnv(log Logger, service string, host string, endpointVar, disableVar string) io.Closer {
 	ze, ok := os.LookupEnv(endpointVar)
 	if !ok {
 		if disabled := environment.GetTruthyOrFatal(disableVar); !disabled {
-			logger.Sugar.Panicf(
+			log.Panicf(
 				"'%s' has not been provided and is not disabled by '%s'",
 				endpointVar, disableVar)
 		}
-		logger.Sugar.Infof("zipkin disabled by '%s'", disableVar)
+		log.Infof("zipkin disabled by '%s'", disableVar)
 		return nil
 	}
 	// zipkin conf is available, disable it if disableVar is truthy
 
 	if disabled := environment.GetTruthyOrFatal(disableVar); disabled {
-		logger.Sugar.Infof("'%s' set, zipkin disabled", disableVar)
+		log.Infof("'%s' set, zipkin disabled", disableVar)
 		return nil
 	}
-	return New(service, host, ze)
+	return New(log, service, host, ze)
 }
 
 // New initialises tracing
 // uses zipkin client tracer
-func New(service string, host string, zipkinEndpoint string) io.Closer {
+func New(log Logger, service string, host string, zipkinEndpoint string) io.Closer {
 	// create our local service endpoint
 	localEndpoint, err := zipkin.NewEndpoint(service, host)
 	if err != nil {
-		logger.Sugar.Panicf("unable to create zipkin local endpoint service '%s' - host '%s': %v", service, host, err)
+		log.Panicf("unable to create zipkin local endpoint service '%s' - host '%s': %v", service, host, err)
 	}
 
 	// set up a span reporter
-	zipkinLogger := log.New(os.Stdout, "zipkin", log.Ldate|log.Ltime|log.Lmicroseconds|log.Llongfile)
+	zipkinLogger := newZipkinLogger()
 	reporter := zipkinhttp.NewReporter(zipkinEndpoint, zipkinhttp.Logger(zipkinLogger))
 
 	// TODO: One day this should probably be configurable in helm for each service
@@ -183,7 +175,7 @@ func New(service string, host string, zipkinEndpoint string) io.Closer {
 	// not recieving messages or presenting callable endpoints, e.g. a cron like service)
 	sampler, err := zipkin.NewBoundarySampler(rate, time.Now().UnixNano())
 	if err != nil {
-		logger.Sugar.Panicf("unable to create zipkin sampler: rate %f: %v", rate, err)
+		log.Panicf("unable to create zipkin sampler: rate %f: %v", rate, err)
 	}
 
 	// initialise the tracer
@@ -194,14 +186,12 @@ func New(service string, host string, zipkinEndpoint string) io.Closer {
 		zipkin.WithSampler(sampler),
 	)
 	if err != nil {
-		logger.Sugar.Panicf("unable to create zipkin tracer: %v", err)
+		log.Panicf("unable to create zipkin tracer: %v", err)
 	}
 
 	// use zipkin-go-opentracing to wrap our tracer
 	tracer := zipkinot.Wrap(nativeTracer)
 	opentracing.SetGlobalTracer(tracer)
 
-	//	logger.Plain.Core().With(zap.String("service", cfg.ServiceName),)
-
 	return reporter
 }
diff --git a/tracing/zipkin.go b/tracing/zipkin.go
new file mode 100644
index 0000000..f9779da
--- /dev/null
+++ b/tracing/zipkin.go
@@ -0,0 +1,10 @@
+package tracing
+
+import (
+	"log"
+	"os"
+)
+
+func newZipkinLogger() *log.Logger {
+	return log.New(os.Stdout, "zipkin", log.Ldate|log.Ltime|log.Lmicroseconds|log.Llongfile)
+}