I can now no longer do the ride so my other hotel booking, this time at the start in Ramouillet is available.
I have a double Classic Room at the Mercure Rambouillet Relays du Chateau Hotel
https://www.accorhotels.com/gb/hotel-5954-mercure-rambouillet-relays-du-chateau-hotel/index.shtml booked for Saturday, Wednesday and Thursday nights (17, 22 & 23 Aug). The room has what the hotel describes as elegant decor, high quality bedding, includes tea and coffee making facilities, flat-screen TV, air conditioning and minibar plus free WIFI access. Late checkout is available on Saturday for €70. I also booked this one early so got it at the saver rate of £240.42 and I can change the booking name online.
Please PM me if you'd like to take it off my hands.