Thank you. I have sorted it now thanks.
The trick is to remove the glass which is stuck to a plastic backing which hold the heating element. I used a sucker to help pull the glass whilst gently prizing the mirror forward using a plastic prise tool. The mirror housing clips into place which must also be prised off using plastic prise tool. There are 4 lugs which need to be released and one Torx screw holding the indicator Ken’s in place . It’s fiddly but the mirror dies come away with some persuasion.