Nice pics here:
http://www.swisscarsightings.com/tourauto2012.html
All in alphabetical order by make, Lotus on page 4/5, I think
Some very nice pictures there
It’s a fantastic event, & SJW & myself can highly recommend following it around France. It’s quite hard work, & you need to be prepared to cover 200 to 300 miles per day, but it’s well worth it! 
I was very envious when you went to see it. One day . . .
very Swiss 
Yep we must follow it again sometime.
It largely depends upon the circuits they are visiting after starting in Paris. The year Rob and I followed it we watched at 3 or was it 4 circuits with Clermont Ferrand the furthest South we went.
Next time we need to try to find the road stage they do each day, but this is not published much in advance
Will try to dig out some Pics
From last time
http://www.exiges.com/ubbz/ubbthreads.php?ubb=showflat&Number=132302&page=1