Just had a read of the BoI.
It gives the timings of the two flights of Seahawks as not more than 90 secs apart.
Ref the Sea Harrier attack on the second pair it says the Harriers were 4-5 miles from their intercept point when they were told to break off when "Birds Affirm" was called.
Pardon my ignorance, being a civvie and all that. Would I be right in assuming "Birds Affirm" be a call to say that the Sea Dart was going to make the intercept as they had a radar lock?