A Green New Deal

There is a planning law that says that front gardens in London should not be impermeable. No-one enforces this except perhaps in Conservation area. We need local representatives to have the right authority to notify residents/owners when they start to pave that they are in breach of the law; and for Councils and representatives of the London Govt to come along and enforce this law. If necessary ensuring that the front garden is paved suitable with permeable surfaces and planted areas. Local Councils don't have enough planning enforcers at present ...
If all the front gardens in London became permeable, just think of all the ground water that would water the trees! And how trees roots would not disturb paving as they search for roots.

An additional point on trees - most are planted in too small a pit. Double or treble the pit sizes so that the roots could obtain sufficient water not to disturb paving.