The UK Travel guidance was updated on 21 May but without an offficial announcement. It is guidance and not law.

Journeys to and from the affected areas – Bedford, Blackburn and Darwen, Bolton, Burnley, Kirklees, Leicester, Hounslow, and North Tyneside – should be avoided “unless essential”.

Exemptions include travel for work, where working from home is not possible, and education.

These are areas where the April02 variant is spreading fastest.

Sources: BBC & The Guardian

Official UK Government page: https://www.gov.uk/guidance/covid-19-coronavirus-restrictions-what-you-can-and-cannot-do#if-youre-in-an-area-where-the-new-covid-19-variant-is-spreading