I would get a sparkie even for the simple jobs now .....
I tried to replace some light fittings ... most seemed to work ok as they turned off and on with the correct switch.
When it came to the laundry, outside light and toilet it was all buggered up and I needed to turn off the laundry, to turn on the outside light which would let me turn on the toilet.
After a day of trying different combinations I finally called in the expert.
As it turns out I had stuffed up the combinations and made the light fittings active themselves :eek: even the ones that seemed to work correctly. It would have been a big zap the first time I changes globes.
Got a sparkie in who fixed the laundry, toilet and exterior lights in about 10 minutes, then he fixed the rest of the active lights.
Very cheap .... very safe.
IF YOU ARE NOT SURE .... DONT PLAY WITH WIRES.
..... now plumbing ..... thats a different story :D