Recently, I've been looking at flights LHR-LAS in BusinessFirst, booking class P.
When I last looked a few days ago, the flights were pricing in at around £2030, but now, all the P fares are around £2950.

Other flights such as LHR-EWR and LHR-LAX are also showing prices near £3000.

Was there a sale, and this is normal, or have prices really just skyrocketed?

EDIT: LHR-LAX is now looking near £3500. I suspect they're doing something to the website, these prices are nuts and fluctuating too quickly.