Sockets...
20 amp Radial upstairs
20 amp Radial downstairs
32 amp ring in the kitchen.
Lights.
Two plate if completely new chases
Three plate if you're going to re-use the old sw drops (or try to)
I think you need to push a small screwdriver into the hole and it releases the catch the you pull the wire out.
If you mean the other side you just push it down.
Power off first obviously