Driving
It will take about 4-5 hours by car if you are travelling from the ferry ports of Caen, Cherbourg, St Malo or Roscoff and 6-7 hours from Calais and Boulogne.
Try www.viamichelin.co.uk for a route planner. Be careful to choose Boussais, Deux Sevres (79600), as with most French villages there are many with the same name.
If coming from Saumur, Poitiers direction - When you arrive at the village take the first road on the left (rue de la daviere) and then the first road on the right (rue des tilleuls) and the house is in front of you on the left hand side.
If coming from Nantes, Bressuire direction - In the village, pass the square with the mairie and bar/restaurant and after the church take the first road on the right (rue de la daviere) and then the next right (rue des tilleuls) and the house is in front of you on the left.
Park at the side of the house.
By Air
The nearest Airport is at Poitiers, which is about 45 minutes away. This airport is used by Ryanair from Stansted and Birmingham.
There are three other airports that are about 90 minutes away. These are Nantes, Tours and La Rochelle. These Airports are used by many airlines from many UK airports. The airlines using these airports are Ryanair, Flybe and Jet2.
I use a good flight checker on http://www.moneysavingexpert.com/. Go to the travel section and click onto the flight checker. It saves having to put the same details in repeatedly and gives the best prices.
Car Hire
It is possible to hire a car at all the airports in France. Try this link for cheap car hire
http://www.carhiresearch.co.uk/loc/France/Poitiers-Airport.html.