I have just moved into a house, built about 1965-1970. The strange thing is
that the soil pipe goes into the loft but is then sealed with an end cap, I
always presumed that the soil pipe should go out the roof. It does not loof
as if the pipe has ever gone outside. The top of the soil pipe looks
correct, it looks like it was made be BAA.

Is there a danger that the gas has no were to go !