As of January 1, 2021, and due to the United Kingdom’s exit from the EU, the simplification measure applicable to call off stocks, which allows the seller to avoid VAT registration in the country of storage, will cease to apply. Therefore, non-UK companies that have a stock of goods in the UK should ensure that the stock is fully called-off by December 31, 2020 at the latest. Otherwise, they will be required to register in the United Kingdom in order to charge, collect and remit UK VAT.
Source: ASD Group