Flying from Heathrow or Luton to Lyon, and taking the ‘Rhônexpress’ or shuttle buses into the city provides a simple and cheap method of transport.
If you prefer trains (or want to be more environmentally friendly) take the Eurostar from St Pancras to Lille, change platforms and pick up the TGV to Lyon. This takes about 5 hours and goes via Disneyland Paris, if you would like to stop there too. (There is now a through train, stopping at Lyon, which continues to Provence, if you want to extend your stay in France.) You can also go via Paris, arriving at Gare du Nord and leaving from Gare de Lyon; the route between the two stations is well sign-posted and is amazingly quick.
Dardilly is close to the main A6 autoroute and can be reached in about 7 hours driving from Calais. (Being able to load the car with a few cases of Beaujolais at French prices may make up for those extra hours at the wheel!)
Chorleywood Twinning Association 