The best source for refurb (and discounted) iPhone 12 deals in general is Back Market. This site not only has a wide range of stock at great prices but you'll also get one full year of warranty ...

"UK consumers likely won't benefit from any weakness in the US dollar, as the tech giant uses the same unit price of £999 or $999 for the iPhone 16 Pro and £1,199 or $1,199 for the iPhone 16 Pro ...