Why is anyone surprised about totally random prices appearing on a BA website?! Mrs Clam and I have often sat next to each other, searched the same exact hotel & flight combination, and been given wildly different prices. Tbh as we sit there going through hotels on our respective devices if we both happen upon one we like we simply compare prices and book on whichever device is showing the cheaper price. Far from a rare occurrence in our experience and we simply put it down to the world leading( in crapiness) IT that BA choose to employ.