diff --git a/README.md b/README.md
index b724cbb..3c754c5 100644
--- a/README.md
+++ b/README.md
@@ -109,7 +109,7 @@ bin/terraform.sh \
   -b/--bucket-prefix     `bucket_prefix` \
   -c/--component         `component_name` \
   -e/--environment       `environment` \
-  -g/--group             `group` (optional) \
+  -g/--group/--groups    `group` (optional) \
   -i/--build-id          `build_id` (optional) \
   -p/--project           `project` \
   -r/--region            `region` \
@@ -133,7 +133,7 @@ Where:
   * It is usual to provide, for example, the Jenkins _$BUILD_ID_ parameter to Plan jobs, and then manually reference that particular Job ID when running a corresponding apply job.
 * `component_name`: The name of the terraform component in the components directory to run the `action` against.
 * `environment`: The name of the environment the component is to be actioned against, therefore implying the variables file(s) to be included
-* `group` (optional): The name of the group to which the environment belongs, permitting the use of a group tfvars file as a "meta-environment" shared by more than one environment
+* `group(s)` (optional): The names of the groups to which the environment belongs, permitting the use of a group tfvars file as a "meta-environment" shared by more than one environment. Comma delimited string, eg `group1,group2`. Do not specify var.group more than once.
 * `project`: The name of the project being deployed, as per the default bucket-prefix and state file keyspace
 * `region` (optional): The AWS region name unique to all components and terraform processes. Defaults to the value of the _AWS_DEFAULT_REGION_ environment variable.
 * `detailed-exitcode` (optional): Passes detailed exit code flag to terraform.
diff --git a/bin/terraform.sh b/bin/terraform.sh
index 36d2a56..6d5b418 100755
--- a/bin/terraform.sh
+++ b/bin/terraform.sh
@@ -8,7 +8,7 @@
 ##
 # Set Script Version
 ##
-readonly script_ver="1.7.0";
+readonly script_ver="1.7.1";
 
 ##
 # Standardised failure function
@@ -134,7 +134,7 @@ declare bootstrap="false";
 declare component_arg;
 declare region_arg;
 declare environment_arg;
-declare group;
+declare groups;
 declare action;
 declare bucket_prefix;
 declare build_id;
@@ -174,10 +174,10 @@ while true; do
         shift;
       fi;
       ;;
-    -g|--group)
+    -g|--group|--groups)
       shift;
       if [ -n "${1}" ]; then
-        group="${1}";
+        groups="${1}";
         shift;
       fi;
       ;;
@@ -480,12 +480,6 @@ readonly global_vars_file_path="${base_path}/etc/${global_vars_file_name}";
 readonly region_vars_file_name="${region}.tfvars";
 readonly region_vars_file_path="${base_path}/etc/${region_vars_file_name}";
 
-# Check for presence of a group variables file if specified, and use it if readable
-if [ -n "${group}" ]; then
-  readonly group_vars_file_name="group_${group}.tfvars";
-  readonly group_vars_file_path="${base_path}/etc/${group_vars_file_name}";
-fi;
-
 # Collect the paths of the variables files to use
 declare -a tf_var_file_paths;
 
@@ -501,13 +495,16 @@ declare -a tf_var_file_paths;
 # the warning about duplicate variables below) we add this to the list after
 # global and region-global variables, but before the environment variables
 # so that the environment can explicitly override variables defined in the group.
-if [ -n "${group}" ]; then
+for group in ${groups//,/"${IFS}"}; do
+  group_vars_file_name="group_${group}.tfvars";
+  group_vars_file_path="${base_path}/etc/${group_vars_file_name}";
+
   if [ -f "${group_vars_file_path}" ]; then
     tf_var_file_paths+=("${group_vars_file_path}");
   else
     echo -e "[WARNING] Group \"${group}\" has been specified, but no group variables file is available at ${group_vars_file_path}";
   fi;
-fi;
+done;
 
 # Environment is normally expected, but in bootstrapping it may not be provided
 if [ -n "${environment}" ]; then