One never knows what all these reports are actually counting unless one reads the small print. I think in this case the report was from a NZ university

A survey by scientists at the University of Lincoln in New Zealand, concluded that lamb imported from New Zealand is four times as energy efficient as lamb reared in the UK, even when carbon emissions from the transport process are taken into account.

The study calculated 688kg of CO2 is emitted per tonne of carcass, through the lamb production process in New Zealand, compared to 2,849.1kg in the UK.

Researchers said the style of farming in New Zealand is considered to be less intensive than in Britain because of the large areas of land.

Like I said, the solution would be to tax carbon equivalent everywhere. Like we do with VAT, we could have a "Greenhouse Added Tax".

Can the last politician to go out the revolving door please turn the lights off?