Josh: No, it won't be any easier, as the new aerial panels on the Dovermast are only fitted on the three faces that point inland. This is already preventing people in France from receiving analogue signals.
Ex-pats in France shouldn't have any trouble receiving satellite transmissions from Astra 2D, but terrestrial is now unlikely to work.
Paul Ebans: The current weather conditions are predicted to give a fair chance of tropospheric ducting over the Heathfieldreception area. This would explain why, if say Crystal Palace signals are traveling further than normal which could give interference on Mux1 (C34) or Mux2 (C29) from Heathfield. You could even be affected by transmitters in South Devon or the North of France. See the page on What is the inversion effect. Also see William Hepburn's Worldwide Tropospheric Ducting Forecasts at www.dxinfocentre.com/tropo_nwe.html