The reliable way to hire a tradesperson

Concrete fence, with concrete gravel boards total height 5ft. Back Garden slopes , they had put pieces of wood in gaps. My side of garden has always been higher ,plus their is a thin line of plinth running between the gardens. But fence is definitely on my side. Neighbour has always complained of my soil going on her side when it rains. Now she doesn't like the fence. Bad side is facing her, and complaining she can't stand to look at the wood. Between the gaps. Only finished 3 days ago. I have contacted the landscaper to come and put extra gravel boards down.instead of wood. Council property. What else can I do IDo I have to have good side facing her??

I have CWI which i am pretty sure has failed. Do companies come out & do inspections to check or is it something i could do myself. I'm assuming it's just a matter of drilling a hole into the cavity & putting a camera through, or would using a camera that shows up any heat loss be better. Is CWI better nowadays than it used to be? Many thanks

How much deposit should a person pay a workman for works totalling 1800