Had slight leaks ( probably due to the original seals on the 30 year old steering box hardening ) on both the high and low pressure sides ( i.e. the drop arm and the steering column sides ). The only way to get those seals I could find was to purchase a complete kit which is fairly priced in any case. A recon steering box is about £170 and a new one costs £550 so I thought it was worth replacing these seals first. The good news is that the leaks ( for now at least ) have stopped. Please note I did not strip and rebuild the whole steering box as that is beyond my skill level so quite a few bits of the kit were unused..