Guys,
Once again, thanks for your speedy assistance.
For those who may have the same problem - I found that the hair-dryer made it much easier to peel off but it does leave a bit more adhesive behind than if you peel it off cold.
I used some automotive carb. cleaner to remove the residue, which it did without removing the paint and left a good clean surface for the new tape.
Vince (UK)