I ve been meaning to thank you all for your advice on this.
So , I changed the cleats, followed QGs advice on pedals , and I can report that I do now get on with clipless.
Entry and exit is easy and the wider platform of the M324 make me feel more secure and in control
However, all is still not well. As I wear orthotics and have wide feet I usually go up a size in shoes. ie and 43/44 not a 42. Which means I can't get the cleat as far back as I would like. Certainly, not as far back as Steve Hogg would suggest I should
The effect of this is , I think peroneal tendonitis, in my right foot. My ankle still aches after an hour's ride this morning. The answer, may be wider shoes in a smaller size to bring the cleat position further back, but also a return to flats and toe clips.
If you have been reading Steve Hogg you have got into the world of mid-foot!
Your options are fairly limited, but they do exist.
1. Speedplay is the easiest to get set up mid-foot. They do an adaptor plate that allows you get further back than any other commercially available system. As per ^, if you start with the right Shimano shoes you'll be in a better position. They generally have the furthest back cleat position of any shoe brand.
2. Flat pedals. Sorry if you've ruled them out, but there are flat pedals specifically designed for midfoot, so worth mentioning again is this context:
https://pedalinginnovations.com/ 3. Bespoke shoes. Expensive, but would work
4. Drill a pair of shoes to fit cleats. Joe Friel and many others have done this with SPDs, but I don't think anyone gets it right first time. Scherrit Knoesen aka The Bike Whisperer (who is a disciple of Steve Hogg) does it very well with Speedplays.
Lots of people who ride midfoot started to do so in response to ankle issues.
If you do go midfoot you would need to re-do your bike fit.