On 17 December 2009, a Blue 1 Avro RJ85 experienced progressive fuel starvation during continued flight after the crew had failed to carry out the QRH drill for an abnormal fuel system indication caused by fuel icing. Although hindsight was able to confirm that complete fuel starvation had not been likely, a failure to recognise the risk to fuel system function arising from routine operations in very cold conditions was identified by the subsequent investigation.