So the good news is that he completed 7 HWs in under 3 hrs whilst I was working and the other two he says he can't do as he's supposed to do them with a friend and will do them tomorrow at school (lunchtime).
Last year (Yr 7) the Head of Year got a few children (DS included) to keep a real record of how long HW took as other parents had complained about exactly what CQ says - different subject teachers were unaware that their colleagues had already set masses of HW, so it all accumulated. DS didn't dare record exactly how long each subject took him - but was more or less honest - indicating things like a 25 mins HW was taking 1.5 hrs.
He was by no means taking much longer than anyone else, although he has a bit of a problem with settling down to work and focusing on the task in hand - but he's become much better with this. Anyway, the result of that close monitoring of HW time was......nothing....It seems that in Yr 8, they get given even more.
I suspect many parents are reluctant to admit that their child is taking so long to do the HW as they believe everyone else's child is super-efficient and much more intelligent. Also, to make a bid deal of this - enough to contact HOY, will draw unwanted attention to DS.
In Yr 7, teachers/tutors would always just say the party line anyway - ie "Get him to stop after the allotted time" - but no child at this school is likely to want to do this if all his peers are completing everything.
He's not at all desperately unhappy BTW. He has a great time with friends at school, is v sociable, adores spending time doing computer imagery design for fun at home (he'd do this all day if he could) and only gets migraines every so often - at the start of term, the end of term or when there is extra pressure. He wouldn't stand out in any way as stressed, compared to his peers.
It's more his sense of the montonous, relentlessness of a 'working life', although i keep telling him that it's not at all all about work. However, because he and other DC are desperate to stay at their school, above all else (in fact they've half-joked they'll disown me when they're 18 if I can't keep up the the school fees and they have to leave!), I'm having to work harder and harder myself and so I'm not able to model a balanced life for them.
Given I only get 1.5 days off a week from paid work and in that time off, I have to fit in all the business admin. and the entire week's laundry/housework/shopping etc etc, I'm too tired to want to fit in extra activities too, like we did when the DCs were younger. It may be that he's 'picking up' my stress and 'translating this into his own view of life - as I certainyl work far far harder than he does, of course. With this in junction to his school life (from 7.30am when I drop them off until around 4.45pm when they come home and then till around 7.00pm till they finish HW), it feels as if all life is work.
All that said, I'm about to start on the domestic tasks now, having made and fed them their lunch straight after work and DS has the rest of the day off!