diff --git a/all-spark-notebook/Dockerfile b/all-spark-notebook/Dockerfile
index db56d47..0926001 100644
--- a/all-spark-notebook/Dockerfile
+++ b/all-spark-notebook/Dockerfile
@@ -5,7 +5,6 @@ LABEL maintainer=analytics-platform-tech@digital.justice.gov.uk
 USER root
 
 ENV PATH=$PATH:$HOME/.local/bin
-ENV NB_UID=1001
 
 ENV PYSPARK_SUBMIT_ARGS="--packages com.amazonaws:aws-java-sdk:1.7.4,org.apache.hadoop:hadoop-aws:2.7.1 pyspark-shell"
 
diff --git a/datascience-notebook/Dockerfile b/datascience-notebook/Dockerfile
index d251ade..e4406e9 100644
--- a/datascience-notebook/Dockerfile
+++ b/datascience-notebook/Dockerfile
@@ -6,8 +6,6 @@ USER root
 
 ENV PATH=$PATH:$HOME/.local/bin
 
-ENV NB_UID=1001
-
 COPY ./files/apt_packages /tmp/
 
 RUN conda install boto3 \