This won't help your problem, but do realise they are obviously very happy to be in your house. All siblings quarrel, but most are only really badly behaved at home, and can be little angels outside in the real world. Even to the extent of defending each other against outsiders
Nicola Sturgeon’s husband Peter Murrell re-arrested over SNP finances.
To think that London, or anywhere else for that matter, does not belong to any one demographic