Came into Gatwick South yesterday, to find a building site around the immigration area. No IRIS. Asked Border Agency guy, who said it had been taken out in preparation for machine readable passport. No, that had not yet been installed. So long queues for manual inspection.
Still feel that matching me with a part of my body is a more secure check than matching me with a piece of paper (however sophisticated). Pity too that IRIS not kept working until the replacement was ready