Snapped Live Wire when changing sockets

[stevetwigs]

Hi All, when changing a socket front, the red live wire snapped (old twin 2.5mm and earth)looks like there was a nick in the insulation so I have lost about 30mm of the end of the wire and now the live wont stretch to the live terminal on the socket front.
Is there a way of extending the red wire? Is crimping a possibility? I would ideally just replace the whole length of wire but its plastered into the wall and I have just decorated with the sockets being the last job on the list. Want to find a sensible and legal solution to the problem hope someone can help.

Thanks

 

[telectrix]

IMO they should not call them 3 pole. that would indicate that you could fit L,N, and E in 1 connector.... Bang.... should be called 3 wire.