A contractor uses a spirit level to check if a concrete post is straight as he helps put up a security fence around a field next to Taxiway Alpha, RAF Mildenhall. The field is being made into a taxiway extension and will provide extra room which will allow swifter takeoffs for heavier aircraft. Currently, heavy aircraft have to back-taxi to the end of the overrun and turn around, which puts stress on the runway and the undercarriage of the aircraft. Approximately 30 concrete posts, covering a distance of about 700 meters, will be used to make the security fence around the contractors’ compound as they begin construction of the taxiway extension.