There are 12 IRIS machines in operation at 10 airport terminals: Heathrow terminals 1, 2, 3, 4 and 5; Manchester terminals 1 and 2; Birmingham terminal 1 and Gatwick North and South.
The recorded barrier availability figures for the first three months of 2009 are:
Percentage availability January 97.31 February 98.02 March 98.90
It is not possible to isolate the number of instances of equipment failure from other faults. However, between January 2008 and March 2009, the overall availability of the IRIS system has been 95.36 per cent.
The number of passenger crossings has now reached the 2 million milestone. To date, 299,975 people have enrolled on the IRIS system.