Thanks mate. What did you have done out of interest? Still undecided on tiles or slates.
sorry for late reply, was in hospital until Tuesday just gone.
Just had normal tiles, these are my roof tiles.
Chimney stack removed, roof re-felted, rotten battens replaced where needed on a semi-detached house.
One thing I didn't like however was that they left the Arial that was attached to the chimney stack on the roof and they said that a specialist Arial fitter will need to re-position and sort out the wires.
Additionally, they said that if I wanted a finial adding that it will cost extra but they would fit it free of charge. I saw some nice dragon/horse mythical type ones on ebay which looked awesome but didn't suit the style of my house.
Had the job done during the winter which isn't busy for roofers due to the weather so I was able to negotiate a decent price.
HTH