Edmund, Brown confirms this lauching from HMS Coventry on 24th may in his book "The Royal Navy and the Falklands War".
But the BOI of HMS Coventry doesn´t seem to show it although some lines are still censoured:
http://www.mod.uk/NR/rdonlyres/F5811...s_coventry.pdf
Look at page 18 of the pdf document (page 11of the BOI itself)
Regards