Finally managed to change the nose badge without too much issue. Procedure I used as follows:
1. Remove the front section of the engine cover. There are around 20 torx screws to remove.
2. Next remove the rubber weather strip that sits on top of the leading edge of the bumper. There are 8 plastic popper lugs, just put your fingers under the strip either side of the lugs and give several quick tugs until they free.
3. Next remove the 7 torx screws that secure the upper leading edge of the bumper to the crossmember. Should now look like this.
4. Next grab your fingers under the top leading edge of the bumper and pull upwards to create a 30mm gap. Use something suitable to wedge open this gap.
5. With a torch now look down the gap created on the underside of the badge, you will see the 7mm badge securing nut. There is a layer of foam you have to move aside.
6. Use a 7mm open ended or combination spanner to remove the nut.
7. Now to the badge, it is stuck on firmly with double sided sticky tape. Use suitable protection, masking tape, cloths etc around the badge. Use a small flat blade screwdriver to lever the badge up to break the adhesive. I used progressively larger screwdrivers as the badge started to give up it adhesion.
8. One badge removed clean off the residual adhesive. WD40 is best to remove the remaining glue.
9. Make sure the surface is spotlessly clean. I used some neat alcohol to clean the surface before affixing the new badge in place.
I didn't bother replacing the 7mm nut as the double sided tape is ultra strong. Believe me the badge doesn't need a nut as the adhesive is that strong! In any event all the other badges are only stuck on with adhesive. If the bonnet badge ever needs replacing again the process will be much easier. Hope this is of benefit to you all