Below is advice from the UK .GOV website

Local government is critical to delivering a successful Brexit.

The UK Government objective is to champion local government and help them to influence, prepare, adapt and innovate in response to Brexit and ensure a successful transition phase with minimal impact on council services and local people. To support this, additional funding for local government was announced on 28 January 2019.

This page provides a set of links to current guidance to aid ongoing Brexit preparations. It is organised into areas of responsibility and will be updated and added to regularly.

Click here for the full website + links.