O
Octopus
This thread is over 1 year old!!
I really dont get why you dont just extend the ring main using a 30a junction box?
Welcome to the forum johnelectrician.
I've not read the whole thread, but the OP wanted more than one socket on the spur, so it has to be fused to prevent overloading the spur. See appendix of BS7671.
By the way, the OP has probably finished the job by now, being a year on!
or he could of just extended the ring final circuit aslong as its within 100sqm, i thoought this would of been the preffered method that putting a 13a fused spur in place?