It has been confirmed that the new Boeing 787-9 Dreamliners that Air France will receive are to be placed on their route between London Heathrow and Paris CDG six-times weekly, making it one of the shortest 787 flights in the world. However, to experience this it won’t break the bank - return fares for the selected route start at £69/$85 for economy and £249/$310 for business class. These services are due to commence in early February 2017. Long haul destinations will also be served by the 787-9, although very few have been confirmed so far.
I’d love to try this in the future at some point, especially the business class!