La Ferme de la Baie is easily accessible from the UK by ferry. Brittany Ferries sail to St-Malo (20 minutes), Caen (2 hours) and Cherbourg (2 hours). LD Lines sail to Le Havre (2½ hours). Calais is 5 hours away.
If you prefer to fly from the UK, Ryanair fly to Dinard airport (30 minutes) and Flybe fly to Rennes airport (1 hour).