Engaged Motor Mover

what's the point of a handbrake if you never use it. leave mine on for 4/5 months over winter and never a problem.

agreed & likewise 👍 though I don't often use my car's 🙄

When I was making an enquiry on another matter, I asked the guy at Powrtouch, the specific question posed by the OP.  He said it was a definite 'no-no' because of the stress it placed on both the tyres and the motor mover if left engaged for a protracted time.

Once bitten twice shy.

washed the wifes car,put in garage mid.feb.I usually leave the h/brake off as she rarely uses the car,on this occasion I applied it (senior moment) 3 weeks later.....tried to get car out of garage........brakes well seized !!!The lesson is.....do not leave a vehicle with the handbrake on for weeks on end.(As long as not stored on a public road!)

As per RichardandRos Powertouch recommend the rollers are not engaged on the tyres except during use as a mover.

like you said. "washed the car and put it away" so brakes still wet and this would have caused rust on drums/discs and this is probably why they stuck on. A quick snap of the clutch should free them.

When parked up, level and steadies down then I release the rollers.

At that point apply wheel clamp, add a chock to the other side and also release the handbrake ( saves it from seizing on.)

Sheer idleness not using the hand/parking brake even on an auto, apart from the fact that it is an offence to park on a public highway without the brake applied.

So you've said before .... 

I'm one of very many idle auto users then.