Any comments on the following, a list of circuits for my CU
replacement.
It seems that even a 16-slot would be too small, given the amount of
slots used by two double-pole RCDs and another double-pole switch for
the non-RCD bus.
Proposed CU circuits:

lights downstairs
lights 1st floor
lights loft
sockets downstairs (not kitchen)
sockets 1st floor
sockets loft
sockets kitchen ring (RCD)
sockets kitchen radial (non-RCD / fridge)
sockets kitchen cooker (30A ?)
lights outside
sockets outside
power to garage / shed (mini-CU in there eventually)
electric shower
light in meter cupboard

These seem like logical groupings.
How do folks manage with less ?
How should I combine these ?

Simon.