To answer the OP's original point yes, it might appear a little ott. But maybe not, it is probably not the easiest thing in the world to be homosexual in the armed forces today, even though times are much more enlightened than one might expect. I am sure that we would all (OK, more realistically, most of us) wish to recruit the very best of the younger generation regardless of sexual orientation (ethnicity etc) and the DIN might just reflect an approach to increase the prospect of presenting us as an open minded and inclusive employer. With the amount of public money we are talking about (hardly a couple of unreceipted nights stay in London for the privileged few of Westminster) I would suggest it is certainly not worth worrying about, even as a point of principle.