We hired one back inn the day (1999) when you could do that - from Rumbelows, maybe? I can't remember. Anyway the flat we were in had no room for both a washer and a drier. We hired because everyone said 'it'll be rubbish, and it will break down all the time'. It was quite good, and it never broke down. I think it was Electrolux.
We now have separates but there is not space for both in the same room so it's a right faff. Too much life is wasted hauling washing and drying around the house; it's a three storey house with the washer on the ground floor, the drier on the middle floor and the majority of the washing (i.e. the kid) on the top floor. We're keeping an eye out in the sales for a combined one to go on the middle floor.