monkeydave, re-read.
I know it's not clear, but it's the wiper, rather than the wash, that isn't working (as far as I can tell)
Fuse No. 21 (rectangular window icon) looks like the rear wiper.
Fuse No. 10 (fan-shaped window icon) would be the front wiper.
Pull 21 and take a very good look. Else it'll be time to take the steering wheel cowling off and looking at the switch stalk. (Observe precautions re Airbags)