British Midland Airways Limited (trading at various times throughout its history as British Midland, bmi British Midland, bmi or British Midland International) 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 Heathrow Airport, where at its peak it held about 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.