In case this helps anybody else....
I am waiting a new bezel insert from Trevor. I removed the old bezel very easily using a hair dryer and a toothpick under the pearl hole. The bezel itself was quite loose so I tried the dental floss trick, this worked a treat. All I would advise is to keep checking the bezel, adding a little bit of floss till you feel its OK. I added too much and it seem to allow the bezel to be bi-directional, I guess it was pulling the spring maybe? I plan on using tiny drops of Araldite to fix the Trevor bezel in place when it arrives (Araldite is brand in the UK, 2 part epoxy glue).
I am glad I solved the loose bezel problem, it really irritated me for some reason.