It's been a week of big developments, with Nato planes scrambled after Russia sent more than a dozen drones into Polish airspace, and Qatar on high alert after Israel bombed a Hamas negotiating team in the centre of Doha. Roland and Venetia unpack the significance of the events and what might happen next. Plus, the team spends a day at DSEI, one of the world's largest arms fairs, to look at how the UK is getting its armed forces ready for the next war. They catch up with a veteran British tank