bathroom circuit regs

Hi there, I'm trying to replace the pull switch in the bathroom as the mechanism for pulling it is broken and can't be fixed. I bought a new 16A double pole pull switch with neon. The old wiring is made of 4 Terminals marked L1, L2, L3 & L4. I hove 5 brown sleeved wires and 1 blue sleeved. 3...

I have a Mira 8.5kw (@ 240v) shower that has broken. I want to replace it ideally with a matching powered unit, however I am unsure about the current wire. It appears to be 6mm² (although isn't labelled), and runs approx 10m total to the consumer unit (7m under floorboards, no insulation, and a...

My current CU has no separate circuit for the bathroom only upstairs lights, upstairs sockets etc So obviously the bathroom and bedroom lighting are on the same circuit. If I have the CU upgraded will that give me the RCD protection the bathroom needs or will it entail some re-wiring as well...