Battery light and clock display.

[cabrioman]

Had a weird one this evening.
Car parked up at work.
Got in the car, switched ignition on, opened window to have a cigarette.
Closed the window, switched off ignition and removed the key.
Didn't leave the car as I was reading my emails.
Battery light, interior light and clock display start flicking on and off constantly. Can also hear a relay clicking on and off at the same time.
Any ideas?

[cabrioman]

Fault found.
It's water getting into the interior light. If I switch the interior light to off it doesn't do it anymore.
I need to replace e the aerial Base anyway so ill make sure it's sealed properly when fitting it.