What the saviour of London’s pigeons taught me about the problem with plastic

Decades ago, the late writer and critic Naomi Lewis spent hours on the streets rescuing birds tangled in nylon thread. She should have been a warning sign of the horrors to come

Not knowing what to do with myself and my bad temper in my 30s, I went to a creative writing class at City Lit, a London-based adult-education college. The teacher looked odd - about 70, she was always dressed in black, her hair was grey and a little wild and she seemed to have dusted her face in flour, some of which speckled her black clothes.

But there was something magical about Naomi Lewis. She was full of enthusiasm, thrilled by the efforts of her class. She would sit at the end of our square of tables, always cheery, and call out excitedly: "So good! So much of interest!"