There is some stuff on another auction saying it was built by Ian Lines in 1976 for David Lambton but I don't recognise the name. Seems he competed mostly "up North" and I don't think he was national figure (sorry Dave if you are reading this).
Russ
1980 TR7 Sprint DHC, 1981 TR7 Sprint DHC
Dursley
UK
http://tr7russ.blogspot.co.uk/
[img]http://i1040.photobucket.com/albums/b410/dursleyman/TR7%20web%20picture/IMG_0479-Optimized.jpg[img]