What are the alternative medicine resources in UK?

http://www.renaissancetherapy.co.uk/therapies.html  here is a site that you may find of interest. I think you could also show your sister in law this site, its a UK health shop, i am in no way a Dr or advising what your sister in law should use, but i currently take these supplements and i have discussed them with my breast cancer nurse and she was fine with me taking them as they are completely organic. http://www.hollandandbarrett.com/pages/product_detail.asp?pid=2133&cpid=2355#review   

May i also suggest your sister in law seeks counselling, although she may feel completely sure she wants a natural alternative, it's important to talk to professionals that can provide emotional support. Cranberry juice, kiwi fruit, lots of broccoli, cabbage, lentils, tomatoes and water ( at least 8 glasses a day ) can all be added to a balanced healthy diet. I personally avoid caffeine and eat fish and chicken. There is also a treatment available in the US known as Ablation. I was told it's at the early stages for clinical trials in my area ( I'm in Northern Ireland ) but after some research of my own i discovered it's already used in America and some areas of England and Wales, privately. Here is a link you could show your sister in law. http://www.cancerablation.com/?gclid=COGW08DD6bQCFe7MtAodeHcAPw 

I hope the links may be of use to you and you can discuss them with your sister in law, all the best to you and your family and i hope she finds information of use to her.