The subject of your message was " can i run 4 spare sokets
in to my shed from a main soket", but now you're asking "can I run 4spare sokets
from it".
Which is it?
I have a shed next to my house
Built on to it, or is there a gap?
What do you mean by that?
You can't spur 4 sockets directly from one on a ring final, only 1. Or none if the socket is already a spur. You can run 4 from a fused spur if it would be OK for your use of them to be limited to 13A in total. But you can't even add a fused spur to an existing unfused one, you'd have to convert it.
Is the donor socket on a ring?
Is it a spur?
Is the circuit a radial?
Unless it's a radial, extending the circuit would be better.
Is the circuit RCD protected?
Is this going to be the first time electricity is taken into the shed, and if so what type of supply do you have (
http://www.diynot.com/wiki/electrics:earthing-arrangements ) and are there any extraneous-conductive-parts in the shed?
You might have to make a decision regarding exporting a TN-C-S/PME earth.
http://electrical.theiet.org/wiring-matters/16/elect-inst-outdoors.cfm?type=pdf
Also, how do you plan to test your new wiring and sockets for continuity, insulation resistance and fault loop impedance?
Do you understand how the way in which you install cables affects how much current they can carry?
Do you know the rules concerning cables concealed in walls, partitions and under floors?
Do you know the rules for cables run outdoors, buried in the ground or overhead?
If you're joining cables, how should this be done / not be done and in what circumstances are different methods acceptable?