By way of an update I have engaged the services of a solicitor regarding this matter. As I have had little success in moving matters any furthur dealing directly with my brother, we agreed that the first step was to send my brother a solicitors letter laying out the current facts as I see them, and, if my brother doesnt make efforts to rectify the situation, what I intend to do about it, including taking the matter to court. It also states that all furthur communication be routed through my solictior until the matter is brought to a conclusion.
My assumption so far has been that my brother simply doesnt believe I will go to these lengths to get my share, hopefully this letter will make his rethink that.