The hamlet of Maintru in Osmoy-St-Valery is just off the D1, less than twenty miles from Dieppe.
The ferry service between Dieppe and Newhaven is operated by DFDS. Alternatively, you can cross the Channel at Dover or by Eurotunnel from Folkestone. Maintru is about 100 miles from Calais and route maps can be obtained from the French Motorway Companies website. (Just type in 'Maintru' as your destination).
There are Ryanair flights to Paris Beauvais from Glasgow, Edinburgh and Manchester. Beauvais is just over an hour's drive from Maintru.