My frail elderly mother has recently moved in with us in Epsom and in so doing has joined the 15 million people worldwide who spend their days sorting through rubbish. Mum, however, does not get paid $1 a day. She does it for nothing. This is because we now have five separate bins and every morning she and the other 10,000-plus members of Surrey’s army of housewives sort through their rubbish to make sure it all goes into the right one.