Hi , some thoughts would be greatly appreciated.

So, happily driving along then car starts beeping with ‘Suspension lowered’ and ‘Terrain control not available’ and several yellow lights on dash..... turned off and on again, and they didnt appear again, and car seemed to be in normal suspension position?

I wondered if it was compressor, as it stays on for a while, or a leak in the system (airbag?)

I dont have a diagnostic tool to see what warning codes have come up. Clearly need to buy one!

Any thoughts very welcome. Thank you

Typical behaviour of a temporary ABS sensor fault is the suspension lowering to its "safe" height and disabling TR. One of the warning lights was likely to have been HDC.