No no no no!
You cannot take the word of a few sparks on a forum as gospel! All we have to go on is one picture and a basic description of the work. We cannot make informed decisions as to whether or not the work complies with the regs or whether or not the work is unsafe, all we can do with what we've been presented with is guess.
Some people don't seem to see a problem, some people do. As I said in my original reply to you, I cannot say for sure as I am not at the job making a full assessment, but in my opinion there are certain aspects that concern me about the work and I feel some of it is suspect.
If you want to find out one way or another whether the work is safe and compliant, what you need to do is pay for an independant compliance inspection of the work so far carried out. Only then, upon presentation of the facts can you say for sure that you're either happy or unhappy with the work. I am not far from London if you wanted to go down that route. I also know a guy close to London who makes his living carrying out independant inspection and testing. There are other options available to you than taking the word of a few electricians on a forum who cannot possibly prove one way or another what is going on with the current state of the work.