Part of the problem with Council leisure facilities, particular swimming, is finding a daytime slot which is suitable. Much of the available time during the day (rightly) is taken up by school swimming sessions, and when you take into account learner classes and other special groups such as mother and toddler etc. there is actually not much time for the casual swimmer. I can not see how the consultants say the facilities are under used during the day, as if you look at the timetables of sessions for the pools they are pretty much fully utilised. If the reserved sessions are not well used maybe these should be reduced or done away with.
I can not see where the saving is going to come from if closing these two Leisure Centres is going to result in the capital cost of about £12M for a replacement, and I presume that the new facility will have running costs as well.