Tesco vouchers are a great help at 3 to 1 - but they don’t allow them for use with an animal (who would want to take a bloody ferret?) I regularly see cats being carried.
I’m assuming you booked a return trip to get that price (£298) as I paid something like £170 each way with miss Molly - but I never book a return trip as I never know when I’ll be back.
btw, my passport wasn’t stamped either direction, perhaps scanned I don’t know, but others travelling with me on the same day were stopped, searched and stamped. The concerns are that if it isn’t stamped, or stamped only in one direction, then it’s feasible to be charged with overstaying the 90/180 Schengen shite.