Please note that all data is displayed as Greenwich Mean Time (GMT) and may therefore appear to be 2 hours "old" during the summer months. Also, please note that should the last date/time update show for example " Last updated: GMT 26 Jan 2010 09:00" this means the data displayed is for the period 09:00 to 10:00. The next update will reflect the period 10:00 to 11:00 etc etc.
Current Value: The 15 minute average
Highest Reading: Highest 15 minute within the last 24 hour period
The data supplied are non-validated and for information only.