"I have remove the covers with the 3 screws and there is a singl led under each but I have no idea how to check if these have gone or not."

From the above statement I would suggest that you call an Auto Electrician, don't meddle with electricity

 

Thanks Drew,
I think it's an issue with the power to the bathroom as flush has stopped and I just filled the toilet up from the tap and the full light hasn't come on. I've checked the 4amp fuse where the casset is and the fuse in the mian box and they all look OK so I am now stummped.

 

"I've checked the 4amp fuse where the casset is and the fuse in the mian box and they all look OK so I am now stummped."

Sorry John, all fuses most of the time look ok. Ideally they should be removed and tested using either a continuity tester or meter.

All through my working live I used all sorts of electrical meters, but for simple electrical testing I much prefer a test lamp/continuity tester. Something similar or even this one.

https://www.amazon.co.uk/Eightwood-Electric-Detection-Continuity-Detector/dp/B0B1P6QR1X/ref=asc_df_B0B1P6QR1X/?tag=googshopuk-21&linkCode=df0&hvadid=606635923907&hvpos=&hvnetw=g&hvrand=5846597363963202359&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1006505&hvtargid=pla-1879290944060&psc=1

 

We have a push button switch on the control panel which is the master switch for lights?

we also have to have the water pump on for the toilet flush to work

 

He says all other lights are working Kay.

 

Yes, water is working on taps, all other lights work but the bathroom seems to have no power. I've borrowed a multimeter and will start checking from light pull swich for the light to where the cassete goes in the 4 amp fuse looks OK but may have gone, I also read a blog on the c402 toilets that says the pumps can just seize but that wouldn't explain why when I filled the toilet from the shower the full light hasn't c.ome on. I've messaged an auto electrician and amwaiting a reply. I'll update this thread when I know more.