I'm not sure WWF is regarded as authoritative on this sort
of thing.

The United Kingdom, unlike the Republic of Ireland or the
United States, is a net meat importer. Therefore, when
a UK person consumes meat, they are adding to demand thus
adding to meat imports, even if the exact meat they are
consuming is local. So I would say it's bogus to conclude
that eating meat in the UK is resource-conserving.

Steve