Just as a matter of interest, according to a post I stumbled across on a well-known German helicopter forum, D-HAHN is currently operating out of London Luton Airport (EGGW), also busy doing some LiDAR survey work over the M1. In this case, the LiDAR system being used to capture the laser points is called TopEye and it basically looks like this:
http://new.helionline.net/photogalle...///D-HAHN.html