I agree with Dazmond Adam, I'm usually £50-£100 down over the year with people moving , can't get paid dying or other unforeseen, but I've been paid over £200 in Xmas tips, you may get your £12 back with costs but you'll miss a days pay and with the aggro n stress you have gone through would you do again for £12, way I see it with Xmas tips your decent customers are making sure you get monies owed by paying bit extra at end of year so your not out of pocket.