She added: “That’s why we and our close allies have determined it to be a warfighting domain.”
The UK “must be willing and able to defend its assets within the boundaries of international law,” Ms Trevelyan said.
She said: “Since 2015, space has been a key operational domain joining air, land, sea and cyber, to join the five domains which inform all of the UK’s joint force defence policy.
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Space war: British force ‘necessary’ to protect UK assets in ‘warfighting domain’ – Express.co.uk