I have used Southworth on two occasions, the second and most recent this year when I moved into a 1960s 3 bedroom house that required all windows and external doors replacing. I obtained several quotes and Southworth came out more competitively priced compared to a larger national company.
Their surveyor was very knowledgeable and helpful, working well with the builders, when we found we needed lintels above the existing frames. Southworth were very flexible with delivery and prompt to fit in with the builders. Before the new windows, the house could only be warmed to 14c, after having the new windows the house is easily warmed to 21c. So I have saved on the windows and heating bills! The site was left extremely clean tidy after window installation and everyone in the company was a pleasure to deal with, a big thank you to everyone at Southworth.