Globaliser,
Unfortunately at times I don't have much of a choice. FR only have the service late in the evening and if I have to travel, due to time constraints, at any other time I have little choice but to go via LHR. Even BRU - LGW - SNN is limited; a very early BRU - LGW sector and the 8 hours at LGW waiting for the only SNN flight!
And of course as it is BRU you pay through the nose!!