Thing you covered this the other week pal, the grey matter failing you?
£19.....inflation like everything else. Failing that it may be that less folk are donating so, those that do are having to pay more to keep the books balanced etc. It's a bit like a late holiday booking. Gone are the days where you could grab a bargain last minute deal, now if you do book late you invariably pay more than when the hotel/cruise booking first became available.