Following Brexit VAT triangulations and other EU VAT simplifications will no longer apply to businesses which are only UK VAT registered.
The UK intermediary, can no longer expect to benefit from this EU simplification, and will be required to register to the VAT of the member state supplying the goods.
According to HMRC there is now a transition period until the end of 2020 while the UK and EU negotiate additional arrangements. The current rules on trade and business for the UK and EU will continue to apply during the transition period. New rules will take effect on 1 January 2021, with the Government working hard to achieve a balanced agreement that is in the interests of both sides.