Definitely a children's charity.
Preferably UK.
Definitely covering the whole of the UK rather than London-based(or anywhere else based).
I work in a primary school with kids from a variety of backgrounds. I know from experience what it's like to watch a child die and to know that it really shouldn't happen.
However, it is also my experience that the children who suffer most are those that continue living and surviving and supporting each other in 'families' which, in theory, are intact but in practice are neglectful, cruel and abusive.
Based on the experiences of the children that I work with, I would like to recommend the following:
Women's refuges - to enable escape from abusive environments;
Mental health - particularly for children and adolescents (if only such support had existed when I was young);
Childliine - with expansion to local support and promotion of the type of circumstances which justify contacting childline (the most 'disadvantaged' and abused children that I know would not even think of contacting childline, as their self esteem has been eroded to such an extent that they would feel unworthy of the help offered. They accept their way of life as being 'normal').
Whichever charities end up being the 'lucky ones',
A big thank you to ebay for donating rather than pocketing the unclaimed prizes.
Happy Christmas folks,
Cider_sister