Some suggestions:
Royal Marsden (1095197, The Royal Marsden Cancer Charity):
http://uk.virginmoneygiving.com/char...rityId=1000108
and two children's hospices:
Helen And Douglas House (1085951, Helen and Douglas House):
http://uk.virginmoneygiving.com/char...elenanddouglas
Acorns Children's Hospice (700859, Acorns Children's Hospice):
http://uk.virginmoneygiving.com/char...rityUrl=acorns
The last one you might have seen on Aston Villa shirts up until a couple of years ago but please don't let that put you off!