Eurobonds
In Revenue and Customs Brief 21/08, HMRC clarify how Eurobonds qualify for the Eurobond exemption from the obligation to deduct tax from yearly interest.
In summary, in order to qualify for the Eurobond exemption, the Eurobond must at the date of payment of the interest be listed on a recognised stock exchange and be admitted to trading on that exchange.
Revenue and Customs Brief 21/08 is available at http://www.hmrc.gov.uk/briefs/company-tax/brief2108.htm.