With hindsight, the CGP books are good for science revision, but Mr Bruff is better for English Lit and Mr Salles for English Language.
I haven't found anything that's really good for History or Geography.
MFL it's just about vocab and verb tables, isn't it?
I'm going to try to be hands off now. DS has what he needs, he's got a revision timetable and now he just needs to do it.