Inside the UK's unknown arms trade

Sky News, in a joint investigation led by Lighthouse Reports with Bellingcat and the Guardian, has uncovered evidence of Russian special forces using British-made sniper rifles - but how did they get there?

The British government claims to have one of the most robust arms licensing systems in the world, but our research reveals it does not know precisely how many UK-made weapons are sold abroad.

Here's how we found this out - and why it matters.

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