Question to the Department for Transport:
To ask the Secretary of State for Transport, whether test, trace and isolate measures apply to people travelling into the UK via the Eurotunnel.
Aside from a very limited number of exceptions, all passengers arriving in the UK, whether UK citizens or foreign nationals, must have completed a passenger locator form and, unless travelling from an exempt territory or region, are required to self-isolate for 14 days after arrival. These requirements apply to whatever mode of transport passengers use to travel to the UK, including Eurotunnel shuttle services.
The Government publishes extensive guidance on these requirements at https://www.gov.uk/uk-border-control/self-isolating-when-you-arrive.