We are pretty certain what Morse would have said about Lewis going green.

The popular ITV detective series, based in Oxford, is the first to be carbon footprinted.

Producers are making a big effort to help offset climate change by printing scripts on recycled paper, using low-energy lighting and insisting that staff share vehicles.

Just imagine the reaction if anyone had suggested recycling Morse's beer glass or trading in his gas-guzzling Jaguar.