have you got a picture of the holes in the bottom of the forks mate ? its not a proper uk supergoose without proclass forks on it . all though the rake on them looks about the same , the rear stays look like they come into the seat tube in the right places . pop it on a set of scales mate it should weigh less than the fat ass us model
some big old threads on gooses kicking around ,
at worst you got a very nice looking expert
but hay, im only a student in the art of the mongoose ....... a master should be along soon