The weather station's UV sensor is currently offline due to a hardware fault.
We will endeavour to get the sensor hardware replaced/repaired as soon as possible, but due to the nature of the failure, it may be some weeks before the sensor is operational again. You can always check on the health of the weather station sensors, directly on the website (remember unassigned/unused sensors should be disregarded).
Apart from the lack of UV readings, the remainder of the weather station is operating correctly.
Apologies for any inconvenience caused!