VATREG37370 | Non-established taxable persons (NETPs): registration options available to NETPs
From HM Revenue & Customs · VAT Registration
An NETP can register using the online VAT Registration Service.
Additionally, the NETP can appoint:
a VAT representative based in the UK who will become responsible for the NETP’s VAT affairs, including being jointly and severally liable for VAT, subject to agreement from HMRC – section 48(2) of the VAT Act 1994
an agent who can register the NETP and act on their behalf [VATREG37650].