Based on what I've read, isn't the T23 a contemporary Leander? Inasmuch as it's a general purpose frigate?
Of course, we sold 3 of them to Chile anyway, but why not an incrementally upgraded T23 as a similar idea? Someone who actually knows about ships would have to fill in the details, and will doubtless tell me why it's not only a bad idea, but totally impossible But to an uneducated mind, they've got everything - Harpoon, Sea Wolf, 4.5" gun, torpedo tubes and a helicopter.
In fact, now I think about it, why don't we have more of these? Do we have a new ASW class analogous to the T45 coming into service? If we did - one of those, one T45 and a pair of "super-23s" as a carrier escort group. What's not to like?
Note: I am not a naval man (yet), so the above post may be absolute balls. Reply accordingly
Yes, eventually the penny dropped that if you knock a big hole in said multihulled wonderships sponsons with something that goes bang, said wondership can't counterflood without taking on an ungodly amount of water.