WP builders of high green just done mine full re roof both sides on large(ish) detached £3000 done in two days they were spot on ! Not sure of number was recommended to me but sure they'll be in phone book
Starlight penistone road and abbeydale road 01142500161 had all three bedrooms done at both this house and my last house too ( as well as kitchen ) not the cheapest , or dearest for that matter but really good I would highly recommend them