WEBF my bonny lad!
The T42 is a very capable platform for defence in depth with multiple sensors - an ideal Wathdog
The T23 is a bit of a joke - an ASW platform that for years had no Central Command and Control System which meant it couldn't join in the overall punch-up and could just barely defend itself with a couple of peashooters - SeaDart and a 4.5" gun.
Very good for escort duties in the days of the Royal Yacht though, as at it had a a "large paint locker" which could, in the words of their Lordships, be used for "Tiddlying"!!
Love many, trust a few - always paddle your own canoe!!