HM Passport Office Backlog

I want to put on the record my thanks to the Belfast office, which went over and above what could be expected to handle the deluge of applications. Mention has been made of a mechanism for elected Members to access help on passport applications, but the telecommunications aspect of that is not working very effectively as we are not getting a response. Can the Minister say whether adequate numbers of lines are available, because we are getting engaged tones and being held waiting on the line for hours—not minutes, but hours? Could this issue be addressed through additional staff?