Shed electrics from garage electrics?

Thanks for the replies.

I'll try and answer/clarify the questions raised in your responses.

My Cu looks very much like this unit replacement/MK5681ED17.jpg
Except that it does not have 2x Rcd's. Instead on the left side is the red main switch and then 6x Mcb's, then an RCD followed by 4 Mcb's.

The Garage feed is on the right of the Rcd (one of the 4 Mcb's) and the last Mcb is an unconnected 40a. I hope that makes sense.

For the shed I only require a single light and one double socket. The socket would be only for occasional use. Perhaps a battery charger, possibly an electric saw of some kind, plus I do want to add a small heater in the shed possibly a tube heater.

The consumer unit in the garage looks exactly like this
It has in fact :oops: a 6a and 16a Mcb with a 40a Rcd Sorry.
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I've just had a look at garage consumer units on the internet and see some 4 way Cu's have 2x mcb's and a main switch instead of 2x mcb's and an Rcd.

Could the Rcd on the garage Cu be changed for a switch thus leaving the supply in the main house Cu protected by the Rcd?

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