Nutty, the two T23s laid up are both GP versions lacking the Type 2087 sonar of the ASW versions and would require their previously declared unaffordable LIFEX refits to return to service.
Following her 2004 refit (including 2087) Westminster had Merlin flight (up to October 2021 at least - excluding 2013) but more recently a Martlet fitted Wildcat (during Ex Atlantic Thunder in 2022) not sure if that was due to further strain on the Merlin fleet, possibly due to those number of airframes receiving the Crowsnest adaptations, or just the Martlet trials.