[Andy S]

Just a thought what if you changed the wording slightly

ie instead of Le Mans put Lemons

And green and white squares cant be a trademark so should be OK on that front

Just be careful of the typeface, so long as its not the same I dont think there is an issue, but I might be wrong, hopefully one of our resident legal people will be able to advise.
Robin where are you when we need you ?????

Maybe a white roundel without the black circle but with black lettering, then the green and white squares in the middle might just work.

Its not the same then is it ?????
They only use a semi circle with a black surround