We have now increased our range of extension sockets to include many variations. Please click Next Product on the right to browse the other types of extension sockets, or for other ranges please use the links at the bottom on the right. UK EXTENSION SOCKETS These high quality extension sockets are available in single, two, four, six or 10 gang versions. They can be supplied with cable of any length, with or without a plug fitted. The four, six and ten gang sockets are also available with surge protection.