As the title says and it's really annoying. All times of day and night; however, last night it went off and finally indicated that the bonnet was open! With opening and forcefully closing the bonnet, I'm hoping that this issue has been solved.

Anyone else had a similar problem?

common problem with the bonnet catch sensor search on here for it not sure if it can be adjusted r needs a new one if you cant find it here search on disco3

As above, try a new bonnet catch sensor. Search on Disco3 site will come up with some helpful stuff  Visitor from fullfatrr.com
* GONE. 2012 RR Sport HSE SDV6 Orkney Grey. Now being piloted by RRSTDV8
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Cheers for the link. The car did unlock/lock normally on previous occasions but last night it just made a double peep noise and didn't lock again. It hadn't shown the bonnet unlocked warning previously either!

There have been several times where the right hand bonnet catch came undone when driving so it might be something to do with that too.

Mine was in back with LR last week for exactly the same fault, they replaced the sensor.

Yes normally is the bonnet sensor tah cause the problem, you can

-Try to clean it and adjust it, might work.
- replace it, I think it doesn't cost much.
- remove it and bridge the wires. '08 RRS TDV8
I converted my diesel RRS to run on an environmentally friendly mixture of caribou fat and baby seals oil