It's foggy in London today so its good timing that I fitted these cheap ebay lights on Saturday.
£8 delivered from Hong Kong for the pair (they have gone up since a few weeks ago)
http://www.ebay.co.uk/itm/261978836099?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
10mm mounting hole fits on the windscreen mounts perfectly. Wired to the switched positive and negative wire in the alarm connector. 10 - 15 min to fit. Happy with the result. They might not last long but for £8 I'll take my chances.