The Wombles must have thought the label was litter, it's disappeared!
http://i158.photobucket.com/albums/t87/ninnyscrops/DSCF0245.jpg
http://i158.photobucket.com/albums/t87/ninnyscrops/DSCF0244.jpg
Looks like a Salvia to me, at a guess Salvia nemorosa Caradonna.
Cheers
or Salvia patens 'Cambridge Blue'
Thank you both for your help - it would appear to be the Cambridge Blue :-D