4th - Cardinham 12.8C
5th - Cardinham 12C (Warmest place on CEEFAX

Has this temperature inversion also been affecting Dartmoor?

Meanwhile, in Penzance, minimum was +4.0C last night. Yesterday
afternoon the MetO was rather strangely predicting 3C for today's
maximum in Penzance). Currently 5.3C and rising.

The sky has an unstable, almost thundery, look about it.

Graham
Penzance