Britain’s mobile phone networks have been asked to confirm that the national emergency alert system is working properly after officials began monitoring the possible re-entry of debris from a Chinese rocket. Industry sources, however, suggested it was uncommon for operators to be specifically asked to verify the readiness of the alert system. Space agencies regularly track falling debris, with objects passing near the UK roughly 70 times each month. British emergency planners nonetheless monitor such events in case fragments reach populated areas and pose a risk to life or property. In a statement, a UK Government spokesman said:“It is extremely unlikely that any debris enters UK airspace.