A rapid ascent, ‘around E5 6C’.
If Scut says E5 (E6 on vid link?) I would take that as confirmation of the original grade, he is a monster. Bit of extra trivia from when I asked Scut about this route - he said he took two of same boot to crag (i.e. 2 lefts / rights - anyone who knows Scut won't be surprised) so he had to borrow the other one off someone else. It was several sizes too big. He did it anyway.
References
[1] https://ukbouldering.com/threads/has-smoked-salmon-bamford-been-climbed-in-its-current-state.25241/