I can see the logic. I wonder about the relative cost of SDB II & Spear, but there’s also the matter of whether there’s really a niche for SDB II between the longer-ranged Spear (which incorporates Brimstone bits, apparently) & PWIV.

Report on Argyll refit which mentions her new SAMs –
http://www.adsadvance.co.uk/hms-argyll-upkeep-marks-start-of-type-23-life-extension.html

Fire Shadow seems to have died.