Jumping on this bandwagon, thank you to the man who overheard me on a freezing day telling my three kids, as a bus arrived and I realised I'd left my Oyster card at home and had no cash, that we'd have to walk (he didn't even know our journey would be more than 2 miles); he pressed £2 into my hand and disappeared upstairs before I knew what was happening. I ransacked my bags and made up the £2 in odd change, sent the kids up to find him. He thereupon refused the money and told them to buy something for themselves with it. He gets even more credit because I did have my buggy with me and he managed to see beyond that...