It seems to me likely that there is nothing wrong here. If this socket is part way along a radial circuit, and there is a connected load further along the circuit, then if the OP disconnected and separated the neutral conductors at the socket, one of them would indeed be "live".
On the other hand, if this is an RFC, then this would be a sign of a break in the ring on the other side of that connected load, which needs investigating
To the OP: What is the current rating of the circuit breaker in the consumer unit for this circuit? (it will likely have either B32, B20 or B16 marked on it)
On the other hand, if this is an RFC, then this would be a sign of a break in the ring on the other side of that connected load, which needs investigating
To the OP: What is the current rating of the circuit breaker in the consumer unit for this circuit? (it will likely have either B32, B20 or B16 marked on it)