British soldiers have fired a new artillery gun for the first time on a tactical exercise close to Russia’s border in Finland. It comes as Russia responds furiously to US president Joe Biden’s decision to approve the use of American long-range ATACMS missiles in Russian territory for the first time. The Swedish-made Archer 155mm self-propelled guns have been acquired as an interim replacement for the 32 AS90s which the UK has donated to Ukraine in its conflict with Russia. The Archer, which is