A BBC report on the PM's announcement whilst in Perth, for the Commenwealth meeting:http://www.bbc.co.uk/news/uk-15510467

There are a number of logistical issues to resolve, especially that the licences will only apply in 'high risk' areas and where will the firearms be kept when not there?

Best of all (my humour) is this:
Other counter-piracy measures being taken include offering support from Treasury officials to Kenya to help its officials track down pirates' assets.
When the UK has multi-billion VAT fraud and the Somalis use a variant of hawala banking this is weird. I am sure the pirates are investing in real estate and other areas across the globe, maybe Kenya too. Humbug!