The RN do seem to like their single role ships, well single role everything. There seems to be a pattern to UK defence procurement of going for unique, single role platforms rather than multirole, or even using common platforms or systems across platforms.
I'm not saying its right or wrong, or even that there aren't advantages, just making the observation.
It's been discussed a few times I know - type 42 only had any surface to surface weapons in Argentine service and 45 only acquired harpoon as hand-me-downs. Interestingly however, the 45 replacement is being assigned a Type 83 number - which properly would be multi-role.
I keep looking at the spec of the Canadian and Australian Type 26 variants and going "cor, I'd like some of that please" personally.