If Exocet and Sea Wolf had entered service in 1969, could Batch 3 Leanders have carried them from new?
Short answerYes; that is a strong possibility.
NotesThe limiting issue in this counterfactual is the date at which the weapons become available. With both systems ready by 1969, fitting them during construction rather than through later modernization becomes a credible option for the Batch 3 ships.