martin, its a standard length crew bus, 1987 leyland roadrunner chassis. Its currently white, but according to VRM was yellow, which would be right..
Merf I should be collecting it tuesday eve from crewe, will get some pics when its daylight. So far I know it went from BR to the Police, then as a first aid unit, then finally a sort of camper. I will keep the re railing one as its more unusual and interest me, besides, I have already spent a lot on it. The white one may be for spares, it has some of the right internal fittings that mine is missing. I may just swap some bits and sell it on, but if its good, it will be difficult not to restore it! Must have more self control ....
Andy