https://www.gov.uk/government/publications/requests-made-to-the-uk-under-the-dublin-iii-regulation
UK requests under the Dublin III Regulation: caseworker guidance - GOV.UK
Immigration staff guidance on transferring asylum claimants into the UK with reference to the Immigration, Nationality and Asylum (EU Exit) Regulations 2019.
dublin iii regulationunder theukrequestscaseworker