It's the new Buyer Protection Fee which is added to Private Seller's listings.
eBay's Buyer Protection fee in the UK is included in the item price for purchases from private sellers. It's calculated as a flat fee of up to £0.75 per item, plus 4% of the item price up to £300, and 2% of the portion between £300 and £4,000. This fee is designed to cover the cost of the Buyer Protection program, which provides buyers with certain safeguards, according to eBay UK.
@nightmonkey2018