Flaxseed
I am happy to get quotes but just hoped someone could give me a very rough figure, but I guess it hard to as every job is different. 
Thanks anyway.
I've just googled it:
You should allow £30 – £60/m2 (of facing wall) for a rendered wall (which includes painting). So a typical three-bedroom semi-detached home with around 90m2 of walling might cost in the region of £2,700 – £5,400. The job might typically take up to two weeks, and you should allow £500 – £800 for scaffolding costs.
Squiffy. A lot of companies hire it. Had to have builders + roofers in over past 5 years. Only one had his own but it was limited and he used it inside. Outside work he hired it and past the cost onto us. There wasn't really any difference in the quotes we had for outside work regardless of owning scaffolding or not.