Just as an update, car now been in garage 4 weeks waiting for parts, Vauxhall have agreed to help with £2500 bill, won’t know how much until I collect. Fingers crossed, will update in case it helps anyone else

I am suffering this on an 18 plate with 40k on the clock. Engine warning came on Christmas Eve. AA error was oil pressure switch. Originally told Vauxhall couldn’t look at it until 29th Jan. Got a cancellation call so car went in last week. Have been told it’s the cam belt issue & could be £2500...