If flights to/from Heathrow are to be banned for those hours (2300 to 0600) during the night, logically the people living near to every airport within the EEC (AMS, CDG and FRA included) would get the night flights banned also.
It will also put the likes of TNT, UPS, DHL and our own Royal Mail in a bit of a predicament also, with the vast majority of their flights being at those times.