Hey gents / ladies, have finally sorted the issue as been back. Methodically worked around the sockets on the supposed ring final as one of old MK outlets ( 4 screws on frontplate ) was seeping green goo and the line cables plus a spurred twin were barely touching terminal and the lot fell out upon undoing the 4 screws !Its not just the experienced and qualified who find this useful. Most trainees and improvers can learn from peoples posts as well so an update post on your findings and outcome is most useful.
Ended up livening up one leg at a time from board and found a single socket had feed in at 250V but outgoing leg was dead from the socket, went back and livened other leg at board and had all other sockets fed except this one. Traced through loft to find where twins were run in wall to below offending socket and followed outgoing dead leg down edge of roof by soffits and once virtually back around 8-9 mtrs away next to loft hatch I saw a 2.5 looking cable appear then dive into rock wool again so I killed mcb and slowly pulled and it seemed loose.
Kept going and cable was stripped bare and taped on the ends with brown ( crispy ) parcel tape !!
Sure enough for whatever reason this was the break, broke a spur from a Jb in loft and extended the ring to add the spurred socket into the ring and back on the found loose cable and sure enough all results were good.
r1 0.38
rn 0.38
r2 0.66 or so haven't got work with me tonight.
R1+R2 0.62
Zs from original 1.55 ohms down to 0.88 and compliant finally.
Thanks all, was wondering if they had doubled radials up for a while but on a 30A mcb or a bad ring and it was.
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