The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.
Troutnut on Feb 23, 2012February 23rd, 2012, 5:00 pm EST
I don't know my UK species, and some (like Hydropsyche) might be hard to tell apart from close relatives in those pictures, but within those limitations your IDs look good to me. Hopefully somebody who betters knows the UK can chime in.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist