I haven't used this company, but people on the Forum have said they are one of the few companies who know how to fit a P5 / P5B front or rear windscreen correctly.

"Old School Windscreen Services is a thriving family-run company with an exceptional reputation for quality and service. Established in the 1950s we have a wealth of experience and a team of technicians with expertise in all areas of automotive glazing. We are dedicated to providing a professional but friendly, hassle-free service you can trust. Whether it’s a replacement windscreen, a side glass or privacy tinting, we always source the best quality parts from our approved suppliers or direct from the original manufacturers".

www.oldschoolwindscreens.co.uk