i would say buy new jubilee clips and find an imaginative way of removing those as damaging the pipe shouldnt matter if your fitting new ones anyway try and stretch the clip and cut it with side cutters.
Yeah I do have brand new jubilee clips to replace them as I'm not worried about damaging them. But I don't want to damage the pipe as if I have to return the car to standard someday I'll need it :bang:
As far as I remember you need to undo the clip on the 2nd photo.To do so, insert a flat head screwdriver in the upper (or in the right hand) slot and work it as a lever.