Only ask that question because the precedent set by the US Navy which with the Phalanx 20mm were specified a dedicated X-band search radar and an even higher frequency narrow beam Ku band for the FCR integral to the individual guns and with the Belgium/Dutch/French MCW ships with the single 40mm gun comes with a dedicated single X-band SN54 for FCR plus EOS, whereas the T31 with its three guns only use the one S-band NS110 lower definition/ frequency radar with the Miradors (assuming no low power FMCW Ku-band LPI Scout fitted as Thales were on very strict cost cap?)
Raises the question whether Dstl only modelled the T31 guns in "The whole-ship shall engage surface targets at range with small calibre guns.’ This came with (classified) subordinate definitions of what type of surface targets, at what range, and what qualified as a small calibre gun (SCG)" and so were Dstl not asked to model the guns in an AA role, could it be a case where the T31 CIWS AA defence was left for the CAMM's, as see no mention of guns for AA mentioned in the Babcock paper and gun use in that role purely seen as an incidental plus?