Recommendation for double glazing or secondary glazing

[Oxenford]

Does anyone have recommendations for a local company that could either replace my existing (rotting single glazed timber box-sash) windows with UPVC double glazing, or install subtle secondary glazing inside? I'm on a fairly tight budget so nothing too fancy, just a reliable and honest local firm who will do the job well and as quoted.

[stevie23b]

Walsh glazing, Half Moon Lane.

[LanceGHI]

Ghi Windows based in surrey. http://ghiwindows.co.uk

0208 647 0600 - mention Lance for further discount.