The reason for this as I have said in other posts is that male/male and female/female shifts are now banned so double shifts are needed if there are 2 presenters, the alternative would be to have a single presenter on for 20:00 – 00:00.
Sky News Today is the only female/female shift that has been on for some time now, it may be that people find it acceptable as they are both not at the desk. BBC News 24 would not do that though. Sky News Today also cannot be presented by just 1 person if needed as other shifts can.
male/male partnerships are avoided but no “ban”—if necessary 2 same sex couple will be used.
The last time for that was last year with Chris Roberts and David Foster, sorry ban was not the right word to use there “policy against” would have been the best word to use.
If people find male/male shifts offensive I would have thoughe female/femlae shifts would also be offensive to some people although it can be seen they were avoiding a female/female shift this time by getting Allan King to do a double shift.