Finaly managed to source some 6.5mm birch ply (1/4" ) from a place called Timbmets in Glasgow (about a 40 min drive) for ?33 per 8x4 sheet so i bought 3 sheets and i managed to collect it while my better half was doing her christmas shopping , so that should keep me going for a while
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Cliveg dont know if this was the same company you were telling me about as the spelling is similar?.
Still looking for some 3mm ply though as timbmet does not stock it , may just buy it online, thanks for all your sugestions ...Pete