Mr. Cowen of Britkits, and forum member Kali have succeeded in fixing the lower headlight so that it lights on the Britkits E and F repaints. I've downloaded the upgrade and am working out how to get it out to those who have the SP E7 and SP F7, the only ones I've done (so far) with the double headlights. It looks as though it will involve a complete delete and re-install to make it work properly. The two or three patch files I've tried work oddly, if at all. I'll upload the fixed files and two new E7s and another F7 in a day or so.
Thanks for the effort guys it looks great!