“John was so helpful with his advice”

John was so helpful with his advice, (our double glazed window, very large) we thought he was the right person to carry out the replacement, we were a little worried how this would be done as per the VIRUS but no worries he and his assistant were so professional. So glad we choose John. Workmanship, price and carefulness perfect. Thank you John and your assistant, we will recommend to our friends. Thank you so much.