I am quite shocked that this is the standard of a Berkeley new home.
Whilst many would argue the perp joints are within tolerance, Berkeley's own standards should be higher than this.
You are after all paying more for this than a similar size home built by Persimmon, Taylor Wimpey or Barratt.
On a personal level, I would not accept this as it is. It looks like it has been done by an apprentice youngster!