Hi lads eventually found it on Thursday. Had to rip up laminate flooring got under to find spur after spur from jb's ( far from a ring ). Was a nightmare to test. Literally had to dissect each jb and test individually. Eventually located cable going under joists.
The fault was this..... Bungalow was built on brick raising it from floor/ground incase of flooding. Anyhow the wooden joistswhere built on brick for support and some sections had been wedged up by slate to get level. Over the years some of these slates had cracked/broken away so joists where dropping and trapping cable. Anyhow when someone walked in that area it was pressing on the cable and shorting out. Cable was destroyed, fire damaged etc.
Just shows the strange and hard faults to find!