EAS experts....
Went to dinner last night... all good. Parked the car. Car has had zero EAS issues. Driving it every day. No delayed rise to drive height, etc. No sag, no problems whatsoever.

Had ride height on lock.
Get in the car... fire her up... get a light on entry and a blinking for target ride height.. normal...
Car a a little bouncy as I drive off.... but minutes later, still no dice. Blinking light for standard ride height.
I press extended ride height... same thing... blinking there, but not achieved I guess.
Car drives fairly normal...
Arrive at my gate 4 miles later... get out, car seems normal in terms of height, but it's dark... so hard to properly tell.
I request entry mode... car lowers... and since then has been at that position, or better say "bump stops".
No more rising to any height. Compressor seems to be running.... too hard to hear a leak, as it's a Diesel...
All air hoses seem to be connected...

Any clues... I have had my share of EAS issues on another Rover... but never a sit on bump stops. So far no EAS code/fault.

Could one bad air spring cause nothing to work at all?
Currently don't have my EAS unlock cable... so dead in the water.

Any ideas what can trigger this issue this immediately? Good - Park - Startup - EAS no longer working

Any tips highly appreciated.

The pump could be worn out and not pumping air if its been feeding a leak, have a check through the steeps in this guide from the late Wammers https://www.landyzone.co.uk/land-rover/checking-eas-compressor-and-diaphragm-valve.172555/

I'm no expert but my crystal ball says " it's fecked mate"

If it drops overnight, there is a leak, airbags probably shot. The compressor is also likely to be knackered from overwork.