P38 judders on idle and low revs

Hello, I wonder if anyone can help please as I am at my wits end. My P38 Vogue (2002) has started (some two or so months now) to occasionally judder when standing still, after starting, when sat at traffic lights or junctions etc etc. Basically any time it is at a stand still, or going very slowly. It’s not every time, but it is getting more often, and has gone from weekly to every couple of days. I have taken it to two different garages and it behaved beautifully for them . We have run diagnostics and nothing showing up. It’s a dual fuel and we live in France. I am at the point where I daren't drive it as i am worried it’s just going to stop! I have searched for hours for this and have found a few threads, but nothing that came to anything. Can anyone help please?

Re posted on Range Rover forum.

Hi best to post this in the Range rover section you will get more expert help.
https://www.landyzone.co.uk/forum/range-rover.10/

brianp38dse said:

Hi best to post this in the Range rover section you will get more expert help.
https://www.landyzone.co.uk/forum/range-rover.10/

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Ok thank you, I’ll try work that out. It took me 20 minutes to work out how to do a thread . Thanks for your post.