With effect from 1 October 2011, when The Companies Act 2006 (Annual Returns) Regulations 2011 (SI 2011/1487) (‘the Regulations’) came into force, listed companies covered by the disclosure requirements of Chapter 5 of the Disclosure and Transparency Rules (DTR5) throughout the return period will no longer need to include in their annual returns detailed information relating to major shareholders, or transactions in shares, that have already been disclosed to the market under the requirements of DTR5. Among other things, the Regulations also provide for reduced disclosures for companies that have been subject to DTR5 for part only of the financial year in question, as well as for companies which are listed but not subject to DTR5. The Regulations apply to annual returns made up to dates on or after 1 October 2011.  

The Companies Act 2006 (Annual Returns) Regulations 2011 (SI 2011/1487) available at: http://www.legislation.gov.uk/uksi/2011/1487/made/data.pdf