At its meeting on 18 December, the Federal Council approved a Memorandum of Understanding (MoU) with the United Kingdom (UK) on mobility and extending cooperation on migration. Although not legally binding, the MoU underlines the close cooperation between the two countries in the field of migration and serves as a basis for future mutual support. It forms part of the Swiss government’s Mind the Gap strategy, which is designed to preserve continuity in Swiss-UK relations beyond Brexit. 

https://www.sem.admin.ch/sem/en/home/sem/medien/mm.msg-id-81714.html