Perhaps you should try thinking outside the box. The original BHD timings were just a red herring. When the BE/BACON deal is finally sealed BE will inherit an airport they dislike with a vengeance. Through BACON that airport will supply them with slots into a "so called" blue riband airport. Their one major hub that does not have flights there will no doubt use slots 1,5 and maybe 3 leaving slots 2 and 4 to go elsewhere. Just in case you still cannot work it out slots 2 and 4 depart the UK at 0840 and 1600.