Ukraine's allies are gathering in London on Friday with President Volodymyr Zelensky and British Prime Minister Keir Starmer pushing for more long-range missiles to be delivered to Kyiv.

They are just one part of a rapidly developing arsenal being deployed on both sides of the front line, as the three-and-a-half year war has reshaped the tools of modern warfare.

Here are the main weapons that have been used throughout the conflict, as both sides have moved to develop cheaper, more agile arms, like drones, in a bid to gain the upper hand.

- Drones, the new essential -

Drones, fired by the hundreds every day by both sides, have become the deadliest weapon of the conflict, reshaping the battlefield and forcing soldiers under ground for protection.

On the front line, drones can detect tro

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