In reply to higherclimbingwales:
Yes - the NNE ridge of Y Garn in descent is a bit slippy, particularly at the top, but if you did fall, you'd only go about 2 feet (in good weather, which we had). I did consider it as an ascent route, but it lacks the interest of the Devil's Kitchen ascent and for a littl' un might be too dispiriting.
Regarding the plastic bags idea, I met 3 members of LMRT at the start of the Pyg track who raised over £2k for LMRT over the Easter weekend. As an experiment, if they were to give out free plastic bags for rubbish next year, it might be possible to test whether they raise more money. I doubt very much that anyone who took one of these bags would leave them on the mountain, but if they did, then the experiment would have failed. There's no harm in trying, is there?