There has been a great deal of speculation, many clues and heavy hints about Harpoon being fitted to the Royal Navy Type 45 Destroyers.
A recent released FOI request would seem to provide the definitive answer
Request for Information under the Freedom of Information Act 2000
Thank you for your email of 11 July 2013 requesting the following information:
Under the Freedom of information act can you tell me if some, or all of the type 45 Destroyers, now in service are to be fitted with weapons from recently retired type 22 block 3 hulls in the near future?
Namely, Harpoon and anti-submarine torpedo tubes.
Your request is being dealt with under the terms of the Freedom of Information (FOI) Act.
I can confirm that the MOD does hold information within the scope of your request and a summary of this recorded information is provided below.
Harpoon will be fitted to four of the six Type 45 Destroyers.
The fit will utilise redundant equipment from the de-commissioned Type 22 Batch 3 Frigates and, in addition, new equipment has been procured to allow integration into the Type 45 vessels.
Currently there are no plans to fit anti-submarine torpedo tubes in the Type 45 Destroyer.
If you are not satisfied with this response or wish to complain about any aspect of the handling of your request, then you should contact me in the first instance.
If informal resolution is not possible and you are still dissatisfied then you may apply for an independent internal review by contacting the Deputy Chief Information Officer, 2nd Floor, MOD Main Building, Whitehall, SW1A 2HB (e-mail [email address]).
Please note that any request for an internal review must be made within 40 working days of the date on which the attempt to reach informal resolution has come to an end.
So there you have it.
Would now be an appropriate time to watch this, again
No you say, OK, how about one of HMS Montrose firing one a few months ago