As a nationwide company (based in Manchester) there are many variables to consider when pricing i.e. travel, overnight stays, materials/delivery costs and size of the project etc. With that, giving a set one price fits all just doesn’t work.
To give a very broad ballpark cost, you can expect to pay in the region of £100 to £160 per square metre. This would include all materials, labour, travel costs, overnight stay costs (if required), VAT and a single assessment.