diff --git a/app/components/login/button_component.rb b/app/components/login/button_component.rb
index b6e88cf..52adb2c 100644
--- a/app/components/login/button_component.rb
+++ b/app/components/login/button_component.rb
@@ -3,7 +3,7 @@
 module Login
   class ButtonComponent < ActionButtonComponent
     def initialize(form:)
-      super(form:, type: :submit, color: :primary, size: :lg, class: "w-full !py-3 mt-5 bg-midnight-600")
+      super(form:, type: :submit, color: :primary, size: :lg, class: "w-full !py-3 mt-5 bg-midnight-600 text-midnight-800")
     end
   end
 end
diff --git a/app/controllers/api/v1/saved_scenarios_controller.rb b/app/controllers/api/v1/saved_scenarios_controller.rb
index 580ef48..16710f6 100644
--- a/app/controllers/api/v1/saved_scenarios_controller.rb
+++ b/app/controllers/api/v1/saved_scenarios_controller.rb
@@ -38,7 +38,7 @@ def update
         result = SavedScenario::Update.call(
           engine_client,
           @saved_scenario,
-          saved_scenario_params
+          saved_scenario_params.except(:version)
         )
 
         if result.successful?
@@ -62,7 +62,7 @@ def destroy
       # Only allow a list of trusted parameters through.
       def saved_scenario_params
         params.require(:saved_scenario).permit(
-          :scenario_id, :title,
+          :scenario_id, :title, :version,
           :description, :area_code, :end_year, :private, :discarded
         )
       end
diff --git a/app/controllers/api/v1/versions_controller.rb b/app/controllers/api/v1/versions_controller.rb
new file mode 100644
index 0000000..dad499c
--- /dev/null
+++ b/app/controllers/api/v1/versions_controller.rb
@@ -0,0 +1,11 @@
+module Api
+  module V1
+    class VersionsController < BaseController
+      skip_before_action :authenticate_request!
+
+      def index
+        render json: { versions: Version.as_json }, status: :ok
+      end
+    end
+  end
+end
diff --git a/app/models/saved_scenario.rb b/app/models/saved_scenario.rb
index a775be5..75a11b2 100644
--- a/app/models/saved_scenario.rb
+++ b/app/models/saved_scenario.rb
@@ -27,7 +27,7 @@ class SavedScenario < ApplicationRecord
   validates :end_year,    presence: true
   validates :area_code,   presence: true
   validates :version, presence: true, inclusion: {
-    in: Version.all, message: "Version should be one of #{Version.all}"
+    in: Version.tags, message: "Version should be one of #{Version.tags}"
   }
 
   serialize :scenario_id_history, coder: YAML, type: Array
diff --git a/app/models/version.rb b/app/models/version.rb
index 80ae200..9ddafda 100644
--- a/app/models/version.rb
+++ b/app/models/version.rb
@@ -2,13 +2,25 @@
 
 # A valid version of the ETM
 class Version
-  LIST = %w[
-    latest
-  ].freeze
+  URL = "energytransitionmodel.com".freeze
+
+  LIST = {
+    "latest" => "https://#{Version::URL}",
+    "stable.01" => "https://stable.#{Version::URL}",
+    "stable.02" => "https://stable2.#{Version::URL}"
+  }.freeze
 
   # All available versions. Uses ActiveRecord syntax 'all' to
   # make future porting to db easier
   def self.all
     LIST
   end
+
+  def self.tags
+    LIST.keys
+  end
+
+  def self.as_json(*)
+    LIST.map { |tag, url| { tag: tag, url: url } }
+  end
 end
diff --git a/app/views/layouts/_buttons.html.haml b/app/views/layouts/_buttons.html.haml
index 700952f..c1df0c8 100644
--- a/app/views/layouts/_buttons.html.haml
+++ b/app/views/layouts/_buttons.html.haml
@@ -1,3 +1,5 @@
 .flex.py-5
-  .bg-gray-100.p-2.px-5.mr-0.ml-auto.rounded-md
-    = link_to t('continue_working'), last_visited_page_path, class: 'continue-button'
+  .flex.basis-full{class: 'lg:basis-3/4'}
+    - if cookies[:last_visited_page].present?
+      .bg-gray-100.p-2.px-5.mr-0.ml-auto.rounded-md
+        = link_to t('continue_working'), last_visited_page_path, class: 'continue-button'
diff --git a/config/routes.rb b/config/routes.rb
index 83baffe..50cf62d 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -84,6 +84,7 @@
       resources :collections, only: [:index, :show, :create, :destroy]
       resources :saved_scenarios, only: %i[index show create update destroy]
       resources :featured_scenarios, only: %i[index show]
+      resources :versions, only: [:index]
     end
   end
 
diff --git a/spec/controllers/api/v1/versions_controller_spec.rb b/spec/controllers/api/v1/versions_controller_spec.rb
new file mode 100644
index 0000000..2080768
--- /dev/null
+++ b/spec/controllers/api/v1/versions_controller_spec.rb
@@ -0,0 +1,25 @@
+require 'rails_helper'
+
+RSpec.describe 'API::V1::Versions', type: :request do
+  let(:user) { create(:user) }
+
+  describe 'GET /api/v1/versions' do
+    before do
+      get '/api/v1/versions',
+        as: :json,
+        headers: access_token_header(user, :read)
+    end
+
+    it 'returns a successful response' do
+      expect(response).to have_http_status(:ok)
+    end
+
+    it 'returns all versions with their URLs' do
+      parsed_response = JSON.parse(response.body)
+
+      expect(parsed_response['versions']).to be_present
+      expect(parsed_response['versions'].map { |v| v['tag'] }).to match_array(Version.tags)
+      expect(parsed_response['versions'].first).to have_key('url')
+    end
+  end
+end