Hello I am a solicitor with 20 years experience. I will try to help you with this.
I am not sure what answer you are looking for. Yes the Scout movement may well have had duties to protect the boys who were in their movement and may well be liable to pay you compensation if you wanted to go down that route. I am not sure that is what you want though. Unfortunately often money is the only remedy that law can provide and that isn't always what people want.
It my be that you could follow this link and instruct one of the lawyerrs on his list who is a specialist on heping the survivors of abuse http://www.apil.org.uk/abuse-assault-lawyer