Electrics to new shed

Yes via a RCD and appropriately sized MCB, dedicated circuit from consumer unit fed with armoured cable. This is not a DIY job though. Best contacting a registered electrician to survey and carry out the work.

SWA (armoured) cable DOES NOT require RCD protection, however the circuits at the far end (in the shed) WILL require RCD protection. The ideal setup is to run a non-RCD protected submain from the house to the shed, a small consumer unit within the shed with an RCD main switch. If your house consumer unit is a dual RCD type and has no facility for unprotected circuits, it is possible to simply run a circuit from here and have the 'RCD protection' within the house, although there is a possibility that a fault within the shed will trip the RCD in the house and thus knock some of the circuits in the house out. There are a number of other variables you also need to take into account here, one being the length of the armoured cable (to account for volt drop). This is not a DIY job unfortunately, if you run a new circuit for the shed (whichever way you do this it should be on its own dedicated circuit) then you will fall under the realm of Part-P. Having building control inspect and sign the work off is prohibitively expensive, a registered electrician who can self certify their work would probably be cheaper. If you are in the Yorkshire area we can certainly have a look over it for you with a free, no obligation quote

I have always used a MCB within the main consumer unit that's protected by RCD. It all depend on the length of the cable you want to run. Maximum ZS values for 6mm cable on a 32amp should be not more than 1.1 ohms. This limits the cable to around 39 meters and you will need to go up to 10mm if the distance is more. You will also need to have all cable factors included when designing the circuit and voltage drops. Connecting the SWA to a consumer unit with a RCD gives additional protection if someone might damage the cable and you can install a smaller consumer unit within the shed without a RCD as the main supply to the shed is protected.

The armoured cable does not require RCD protection as it is a sub main feeder to a second distribution board. 30ma RCD protection is required for the sub circuits in the shed.