As BT operates in around 180 countries, it owns and leases a range of buildings and facilities in the UK and around the world. In 2001, it sold some of its UK property portfolio for £2.38 billion to Telereal Trillium in a 30-year leaseback. The deal included 6,700 properties and contributed towards alleviating its debt at the time, with the main advantage being flexibility as it allows BT to vacate property over time, so as to adapt to changing operational requirements.