When I go to start it and move off after it has been standing all night outside, it doesn't want to move, and I have to reverse and pull forward again until there's a small bang, and off we go.
Is this the brakes binding or does it sound like the hand brake, sticking?
Sounds like the brake shoes are sticking, chrissa. Probably due to the manky damp weather. To put your mind at rest you could get them and the hand brake mechanism checked out at a local garage.
Brake dust and water makes a nice glue, and a bit of rust helps bind the whole thing together. Always worst after heavy rain or driving through a big puddle.
Short term solution is as Bhg suggests, park in gear and don't apply the handbrake too hard.
Longer term is to get someone to clean out the brake drums.
I recently had this happen with my little oldish Suzuki Alto. I asked my local garage & they advised me not to put the handbrake on so hard. Not happened since so guess I was yanking it up too much!
Just out of interest you need to depress the clutch on a Volvo (and a SAAB, I think) before it will attempt to start. Isn't this a sensible safety feature? In any case, depressing the clutch disconnects the engine from the gearbox and makes it easier to turn-over the engine (no drag from the gearbox oil).
Thanks for the parking advice, guys. I always put my handbrake on, AND leave it in 1st gear when I park. There's no way I would ever park with nothing holding the car. :/ Or, not depress the clutch or check its in neutral, before starting it.