Monarch flew ski flights to Toulouse at weekends for the winter seasons, ie January to April, and December from Gatwick and Manchester only
Other UK charter airlines would have flown ski flights as well to Toulouse during the same period, from the major UK airports, Birmingham for example had Air 2000, British Airways and even Maersk Air UK flights. Airtours, Britannia and Caledonian would have flow from Gatwick and Manchester as well, Air UK from Stansted. Bordeaux wouldn't have been a winter charter destination.
For the summer period, I would have thought only BA would have served Toulouse and Bordeaux from Gatwick and possibly Heathrow