Disco 2 air suspension

Hi all, my missus's disco(2000 TD5) sometimes sits on its left side if left parked, not all the time but always the left hand side?? i replaced the air compressor last year and all was fine. about 5 months later it started doing this. Do you think it could be just a loose air hose or has anyone else had similar.
regards in advance

It's worth doing a search as there are TONS on posts on this - rather than repeating it all here, you'll probably find everything you need to know. Probably just a leak in the bag on the left hand side. Easy to replace.

If you search there's indtructions on how to change bags, etc.