Mark from European Driving Tours has been in touch. They are organising a Classic Le Mans trip this year for R23, and they have had a cancellation and are letting R4 have the first opportunity for this space.
Mark and Alison organised our excellent Classic Le Mans Trip 2 years ago, and this is very similar apparently, but not quite the same. On that basis I can personally recommend it.
So if you fancy a trip to Classic Le Mans contact European Driving Tours ASAP - details are below (ignore the fact that it says sold out "Sold Out"!!) http://www.europeandrivingtours.co.uk/8-9-day-tours/2018-classic-le-mans/