Wiring a FCU to a double socket

[johnnyb]

I have recently fitted a inset fire and wish to connect this to a switched fused connection unit
Can i run a spur to this fcu from a double socket which already has three 2.5 twin earth cables fitted
thank you

 

[Markyd]

Putting 4 cables into one socket is not advisable and can be dangerous due to the cables not being connected properly...overheating...fire,also if extending circuit it must be rcd protected and a minor works cert completed

 

[driverman]

Putting 4 cables into one socket is not advisable and can be dangerous due to the cables not being connected properly...overheating...fire,also if extending circuit it must be rcd protected and a minor works cert completed

What's already been wired off the double socket. I'm assuming the socket is wired on a ring circuit. Of course that wants checking out and confirming.