Changing Faces provide help and support to people who have a condition, scar or injury that affects their appearance. They also run the Skin Camouflage Service.
Look Good Feel Better is a cancer support charity that helps women manage the visible and often psychological side effects of cancer treatment.
They produce a self-help DVD and booklet, The Look Good Feel Better Confidence Kit, and also hold free skincare and make-up workshops in locations across the UK.
Website for men: http://www.lookgoodfeelbetterformen.org/
The NHS Choices website has a page about the wigs available from the NHS in England, including charges and exemption information.