Also, what do I say - "Your laziness has caused me five days of graft and a few hundred quid of costs, please keep your plants under control in future?"
I'd be having that conversation first, before spending five days on it. Our downstairs neighbour's ivy was all up our house, stopping us fitting new windows. After a bit of back and forth he agreed to pay for the scaf tower and builder's time to remove it. It's since been cut at the root.
In London? Are you mad?
Also, what do I say - "Your laziness has caused me five days of graft and a few hundred quid of costs, please keep your plants under control in future?"