Alina75 s

I'm an artist based in the EU, and I'm taking part in a one-off exhibition (with a possible sale) at a London art gallery. The gallery says I need to register for UK VAT and account for UK VAT with H.M. Revenue & Customs. My painting is priced at £900, but the gallery takes a commission + VAT, so I'd only receive £410 if it sells. There's also a chance it won't sell, and I'll just get the painting back. My questions are: Do I really have to register for UK VAT? If do have to register, even if this is the only sale I make, and there's nothing further planned, would I still need to report to HMRC every three months? I've tried reading all the information on gov.uk about VAT, but it's a bit confusing. Thank you.