Link to House of Commons text:
http://www.theyworkforyou.com/debates/?id=2011-01-25a.265.0&s=Lossiemouth#g269.0
“Today, RAF Leuchars' mission is to deliver and maintain UK quick reaction alert (interceptor) north, concurrent with the growth of Typhoon, while supporting other military operations. The delivery of the northern element of quick reaction alert is RAF Leuchars' top priority and requires Typhoon and Tornado F3 fighter aircraft to hold high alert to scramble and intercept unidentified aircraft approaching UK airspace. RAF Leuchars is geographically well located for the delivery of QRA operations. However, it may be possible to mount northern QRA from another location. Lossiemouth and Leeming in north Yorkshire would be possible options.”