You could add another socket as a spur if this socket is on the ring.
Otherwise you will need to extend the cable either by adding 2 junction boxes or crimping a new cable onto the old. Use ratchet crimpers if using the second method.
and note screwed connections need to be accessible crimped ones dont (neither do soldered) -note you need to heatshrink sleeve shrinked +soldered connectors.
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local