As a British passport holder, is there any use in obtaining a Spanish Passport? Also, how do you go about getting one and whats the proceedure?

Thanks!!!

You need to obtain Spanish nationality. Details here:

http://www.mju.es/mnacionalidad.htm

Unless you fall into one of the special categories you need to have been the holder of a residence permit for at least ten years and, among other things, you have to pass a nationality test displaying a good knowledge of the language and history of the country.