Using old 2.5mm t&e with 1mm cpc

[bigspark17]

Can i add additional sockets off a cirvuit that uses 1mm cpc within a 2.5t&e cable please?
Or can i use it to feed a switch spur then 2 x sockets?

 

[westward10]

Yes the ring final in my house is predominantly 1.0mm² cpcs and I have added to it. It needs to satisfy adabatic requirements but it should do unless protected by a BS3036 30A fuse.

 

[brianmoooore]

You can add to a circuit that already uses it, but not with the old cable, and the existing 1.0mm2 cpc should be noted in the paperwork.
The old cable should not be used for a new spur.