Thanks for the nice comments.
it was a very fat Grayling indeed which is where the weight comes from.
Interestingly we sem to have two different strains of grayling on my local river.
The type in the above picture which have lots of dark spots and the type below which have very very few spots and a strong yellow strip along there belly.
This one was caught just a few yards from the fish i caught on the same day.
I would dearly love to catch Arctic Grayling at some point and have seen some wonderful photos of fish caught by my friend Pete Cockwill in the UK when fishing in Alaska.