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.