<ul><li><a href=https://www.oecd.org/sti/broadband/2-6.pdf target=_blank>Government ownership of public telecommunication network operators, Table 2.6</a></li><li><a href=https://www.bt.com/bt-plc/assets/documents/about-bt/our-company/group-governance/articles-of-association/articles-of-association-bt-group-plc.pdf target=_blank>Memorandum and Articles of Association of BT Group plc(Last updated in July 2015)</a></li></ul>