British Midland Airways Limited was an airline with its head office in Donington Hall in Castle Donington, close to East Midlands Airport, in the United Kingdom. The airline flew to destinations in Europe, the Middle East, Africa, North America and Central Asia from its operational base at London Heathrow Airport, where at its peak it held ca. 13% of all takeoff and landing slots and operated over 2,000 flights a week. BMI was a member of Star Alliance from 1 July 2000 until 20 April 2012. BMI was acquired from Lufthansa by International Airlines Group on 20 April 2012, and was integrated into British Airways by 27 October 2012. BMI's subsidiaries Bmibaby and BMI Regional were also purchased, although IAG did not wish to retain either. BMI Regional was sold to Sector Aviation Holdings in May 2012 and continues to operate, whereas Bmibaby closed down in September 2012. British Midland Airways Limited held a Civil Aviation Authority Type A Operating Licence, permitting it to carry passengers, cargo and mail on aircraft with 20 or more seats.