Measure: River Thames at Caversham Lock - level-downstage-i-15_min-mASD
Water Level (Downstream Stage) measured relative to stage datum in mASD every 15 minutes (instantaneous)
API
Get recent readings: http://environment.data.gov.uk/flood-monitoring/id/measures/2201TH-level-downstage-i-15_min-mASD/readings?_sorted&_limit=500