Eurostar offers trains from London to Aix-en-Provence and other cities in southern France. Most of these services, including the ones to Aix, require a change en route.
Departures take place from St Pancras station, and journeys on trains from London to Aix-en-Provence require a quick change in Lille or Paris. Passengers returning to the UK are able to clear passport control in France before travelling back to the UK.
Fares to Aix-en-Provence vary depending on the season and how far in advance you book, but can start as low as £119 return in Standard class.
There is a £4 fee for all credit card bookings, but no charge is made for payments with debit cards.