USA prices remain the same as they've always been. $1499 for 8-Voice, $1999 for 16-Voice.
Probably has a bit to do with USD/UKD exchange rates. UK Pound has been generally dropping in value compared to USD over the past few years. So 5-15% increase in relative UK price is probably due to that... depending on when you purchased. I see Andertons at $1299 now, which, considering current exchange rate seems about right, if not a good deal for UK buyers.
Also, it seems like there has been a surge in demand for video and music equipment since the start of lockdowns, as well as a global decrease in supply/manufacturing capability... so there may be some supply/demand consideration factoring into retailers decisions. The Rev2 does seem to still be in stock at most places, though other synths, pro audio equipment, and video gear I've been following is out of stock at a lot of places.