An old chestnut this one. As a gardener in North London it's a conundrum I face often - and not just in Autumn. In my experience there has been a growing shift away from designer lead, sharp edged gardens towards a greener, more tolerant one. This is to be welcomed. However,those spaces where wildlife really flourish, are always the "neglected" ones. These are rarely if ever planned to be havens they just end up that way, and when you have two or three together, they can look like miniature nature reserves.Certain trees and shrubs are magnets for birds and insects, Pyracanthas are great for House Sparrows- the taller and denser the better.In the Autumn/Winter they will have Blackbirds and thrushes feeding on the berries.Elder is great for birds and insects and Apple trees hard to beat. Sadly, many more clients want their ponds filled in than started. Wherever I have put in even small ponds - or restored old ones the insect life has exploded in just a few months. Soon followed by frogs, toads even newts.