I watched it too - he was useless!
What he had was twol lots of chippy immature adults with too much time on their hands being overly bothered about the actions of their neighbours.
The colonel had no idea how to open negotiations, much less continue and conclude them, and it was patently obvious that the situation will only be resolved by one family moving - my money is on the 'tidy' couple, since the woman obviously feels isolated, and said so at the end of the programme.
If this is an ecample of how the U.N. conducts negotiations with warring factions around the world, talking to men with swarthy skinds and machismo to burn like an earnest vicar with nothing but love for everyone, then it's ltittle wonder that the U.N. spends most of the time with a metaphorical, and sometimes literal, AK47 rammed up its fundament!