I have an old S2 fuel tank that I replaced because I was worrying it was liable to leak. When I got the Europa, 10 years ago, the tank had a leak on the lower seam, I repaired this with fuel tank putty and used POR fuel tank sealer inside, outside was painted with Hammerite or POR15. Now I have this off the vehicle and inspected it, it still appears solid. If this is of some use to someone then it is free to whoever can collect from Bristol. Needless to say, this should be fully inspected before further use as a fuel tank.