Four surveyors from Storm Geomatics Ltd spent the entire night surveying drainage systems and ballast levels on the railway line at either end of the Newport tunnel, South Wales. The track was under a possession from 01:30hrs till 07:00hrs one Sunday morning which allowed surveyors full access to the relevant drainage, which is failing to take heavy rain away from the line. Two teams were mobilised in order to capture all the site data in one session, saving the client time and money. Although the weather was dreadful at times the survey teams completed the work keeping the urgent project on schedule.