Britain's top military commander has warned the UK is "letting down" its allies by not taking part in airstrikes against so-called Islamic State in Syria.
Chief of the Defence Staff, General Sir Nicholas Houghton, compared the situation to being asked to win a football match without going into the opponents' half.
Sir Nicholas told Sky News: "To an extent yes, we are letting our allies down by not being a full player.”
"But my view on this is a far more fundamental and simple one in a way and it's the point you make about going up to a border and having to stop there. In the most simplistic way it's like being asked to win a football match but not being able to go into the opponents' half. Daesh, ISIL, they have a caliphate that extends across that border. But the source of their power, their command and control, their logistics, their organisation, the place from which they issue oirders to international terrorists is from within Syria. And so to be denied our ability to play a proportionate role in that makes no sense," he said.
© Independent Television News Limited 2019. All rights reserved.