You know those websites that sell lordships?
I once enquired by email about buying one and asked whether I (female) could call myself Lord. The reply was yes, and that a number of their customers did just that.
(I know the titles can only be used "in non-legal contexts for enjoyment purposes", but I'd bet that if I can state my gender as 'male' on NHS records at will, I could damn well use the title 'Lord'.)