I would have said Bill Steer as well...BTW anybody know what kind of guitar he's using here...and no it's not a Jackson.
circa 86-88
He's also using it in the Wake up and Smell the Carcass DVD..."Gods Of Grind Tour" section...I can't figure it out.
It's "A Cautionary Tale" - 'cos Martin sings over the start of the solo (which he looks to be doing in the pic) , I'm going to guess it was Dingwall's in '87 as well.