Thanks Sherlock. I certainly don't underestimate the power of the law in my case. Therefore, I do have a solicitor involved already, and the whole reason the electrics were called into question is because of a very long list of defects (not snags) that have developed over the course of the project. I have plenty of documented evidence of every defect. Quotes to rectify etc... The works have been surveyed by two surveyors, including the architect and various others and I have written reports to confirm findings of various professionals.
That leg is very VERY wobbly.
This is far from a get out clause for me: I will have to pay more money for someone to undo, rectify and finish a whole range of structural, plumbing, sewage and now electrical problems. The extension is basically a shell. I hope I'm wrong when I say I detect a hint of sympathy not from you but from other posters on here but trust me, we are talking about a complete cowboy here! As the matter is likely to go to court I've removed all my pics of the house, but if you could see the state of my house for yourself, you wouldn't have a shadow of a doubt...