I had some dealings with an independent last year when his builders had done a loft conversion and they had not served a PW notice on the neighbour, and the neighbour was concerned on other things
I asked if he had initially advised the builder or client that a PW Notice should have been served ... "err, no that's not my job"
I asked if the steels had been checked that they had been installed properly .... "err, no I visited afterwards and the correct steels were in place"
What about the bearings .... "err, well I did see that they were on the correct padstones"
What about the bearings ... "err, well everything seemed to follow the SE's design"
Can you confirm that the bearings were adequate ... "err, well the wall was made good, so I could not actually check the bearings, but everything seemed fine"
So you had not checked the bearings ... "No"
So you would not have see that the steels were not actually built in, were just gobbed up, and were not sitting properly, and the holes to the party wall were not actually made good to any of the five beams, or where the purlins have been removed ... "Really? Oh, its all been signed off now"