As of March 8, 2021, all departures from the territory of England are required to fill out a declaration regarding the purpose of travel.
Legally permitted reasons for international travel include: - work - education - volunteering; - medical reasons or the so-called compassionate grounds (actions expressing concern or concern for others); - weddings, funerals and related events.
Detailed information about travel from other parts of the UK can be found at the following link: https://www.gov.uk/government/news/mandatory-form-for-international-travel-launched-to-prevent-illegal-trips
We attach an internet link to the Declaration, recommending that the instructions in the declaration be read, as well as the information of the internet links in the government website: https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/967118/declaration- form- for-international-travel.pdf
The fields for filling in the declaration are located on the second and third pages of the PDF file (which you reach using the above internet connection). The completed form must be printed on paper or available on your phone.