Ukraine showed the UK its classic 'tactically safe' trench-clearing methods don't work in chaotic, booby-trapped trenches

Ukraine's east has become full of trenches, which are key to keeping soldiers in alive in a flat landscape packed with drones and artillery.Roman PILIPEY / AFPThe UK had assumed trench building and clearing to be quite clean and surgical, an officer who trained Ukrainians said.But in Ukraine's fight, they're uneven and full of traps.It has led the UK to rethink its own approach to trench warfare, the officer said.The trenches in Ukraine are too messy and irregular for the UK's classic "tacticall