On Fri, 29 Apr 2016 20:44:09 +0100, Jeff Layman
wrote:

You should look he
http://www.checkatrade.com/Search/?l...roydon&cat=107

Albion Windows are listed by Checkatrade
(http://www.checkatrade.com/AlbionWin...nservatories/), so should
be fine, but there are a lot of other companies listed as well. You
should get a couple of other quotes from them too.

Good.

Neither Everest nor Anglian have entries in checkatrade.com. Are they
afraid of negative feedback, or is there some other reason for their
exclusion?