Certain Type 22 Frigates carried both a Lynx and a Sea King. The Type 23 was designed with the Merlin in mind.
T22 beam = 14.8m.
T23 beam = 16.1m.
Surely a Lynx/Merlin combination would allow the Merlin to do anti submarine stuff and surface search, and let the Lynx concentrate on anti surface tasks - Sea Skua, HMG pod and boarding party insertion?