@crank39 thanks for all the responses.
I guess toeing & heeling will involve opening up the frame with the glass in - is this something which I as a non-window guy could do, or do you recommend calling in the professionals ?
Please see attached pictures. This window seems to have dropped a little and there is a gap at top which lets in a lot of road noise & draught.
The window itself opens & closes perfectly. Windows are in place about 13 years.
Any thoughts on what I need to adjust to seal it up.
Many thanks.
The thread was locked so I had to open a new one
You may or may not have seen this
http://www.bbc.co.uk/consumer/tv_and_radio/watchdog/reports/homes/homes_20070220.shtml