I have been know to do a 10hr run with 2 stops... but then I love driving and don't find it the 'drag' that sadly some do. I'd normally expect to stop about every 3-4 hrs or so but it does depend (when I had the last cuppa!).

I agree Brake are over-reacting. Funny how the RAC say that 2% is the 'fact' so they estimate a figure that far exceeds this and so promote a non fact !
IMHO that is misleading.
Yes in an ideal world good sleep the night before and so on is very good but if they had asked in this survey how much sleep you have had before a long journey or for work I think they would be surprised. (:) My estimate!)
Trying to ensure people follow best behaviours is of course important for road safety.
But don't you think that it comes across as 'another attack' and another way to potentially monitor and then penalise drivers & riders ?
They cannot pick and choose 'driver/rider reaction' when they totally ignore it, whenever they discuss speed and speed limit setting (20mph 30mph etc) and the 'hit me at 30mph' non-sense!).
I do agree that we need stop opportunities every 15-20 miles as a minimum or every 10 where the roads are regularly dense traffic. But it needs to be a stopping and toilet facilities as a minimum. But it won't take long before the food vans etc arrive too!
Essex has a stop with an circular loo arrangements with a central washing hands area in the centre. It woks well and is unisex. Somewhat freezing in the winter though! But it does the basics and that's what's needed.
If you know that you are tired it doesn't prevent one from driving just that one needs to be very aware of the potential development of that but it doesn't mean that one will or always become more tired. I can be a little tired on occasion, but once started a long drive I can 'wake up'. I think I relax into it !

But when tired I stop and sleep. And that's all we need all drivers/riders to do just be aware enough of their state and act responsibly and appropriately (as always!)
Plus an Expresso soon wakes you up, and if it doesn't then it's simple, sleep.
The current Services that try to limit you to 2 hrs is potentially dangerous and silly.
55% of drivers 'spurn rest breaks'
July 25, 2013 05:40
Many motorists are driving when tired, with some not stopping at all on long journeys, according to a survey.
A survey found that nine per cent of drivers do not have any breaks on long journeys unless they absolutely have to
More than half (55%) ignore basic advice to take rest breaks at least every two hours on long trips, the poll by road safety charity Brake and insurance company Direct Line showed.
In addition, 9% do not have any breaks on long journeys unless they absolutely have to.
The survey of 1,000 UK drivers also found that 14% of male drivers have driven for six hours or more without stopping, compared with 3% of female drivers;
Half of male motorists have driven for four hours or more without stopping, compared with 31% of females; and 35% of drivers admit sometimes or always trying to push on if they feel sleepy at the wheel.
Brake deputy chief executive Julie Townsend said: "A large proportion of the driving public are scarily confident they can push on through on long drives without stopping.
"In reality, regular breaks - at least every two hours - are essential for staying alert and awake, as is getting plenty of sleep the night before. Sleepiness can catch you unawares at the wheel and it only takes a couple of seconds on a motorway to cause absolute carnage. "
RAC Foundation director Professor Stephen Glaister said: "Officially, fatigue is reported as a factor in just 2% of all accidents but the best estimates are that the real figure is 10 times greater.
"Not only that, tiredness-related crashes tend to be more severe as drivers are unable to take evasive action.
"There is a strong argument for introducing more rest areas on motorways as are common on the continent. These are not full-blown service areas but frequent points where people can simply pull in and take a break."