Financial Transaction Tax and Economic and Monetary Union

Before my hon. Friend moves on, I want to ask a question related to an international financial transaction tax. It appears that progress has been made on getting the UK overseas territories to be more transparent on tax. Is this not a good opportunity to encourage them to also be part of an FTT system, because we all know that a lot of the dodgy transactions take place in bank speculation in some of the countries for which we have an indirect responsibility?