Hi,
Some little sod just broke my roof aerial, it's fitted to the rear of
the roof and I am having trouble replacing it.

I bought a new aerial for it, but getting the old one off is the problem.

I tried to unscrew it but it kept going round and round. Next I removed
the rubber sheath at the base of the aerial to get a better look. there
seems to be two nuts and both turn together, so I am guessing that the
bottom one has come loose from the base mount. do I just need a couple
of small spanners to get the aerial off or is there something more to it
before I go ahead and break something.

TIA
Dave