Having done a bit of shopping, we notice that the only departures on a Sunday travel back to Luton, so we take a five-minute walk to the Quadrant bus stops. There, we assess what services go where. It turns out that there is also one departure, which doesn't stop at the ASDA, that doesn't go to Luton. So, rather than be put up by moaning co-travellers about going back to Luton, we take the 11:30 Arriva Herts & Bucks service F70 towards Milton Keynes, but we disembark at Leighton Buzzard, West Street, arriving there at 11:55 on Sunday morning.