Defence expert Francis Tusa argues that the UK is dangerously exposed to drone and missile attacks due to a severe lack of investment in land-to-air defence systems, contrasting with significant spending by European nations. He posits a scenario where a dozen low-cost drones, costing less than £37,000 each, could cripple London by targeting infrastructure like transport hubs, hospitals, and power grids, causing mass casualties and panic. Despite a £1 billion investment announced for integrated air and missile defence over several years, Tusa contends this is insufficient and delayed, with real spending not expected until the mid-2030s, while threats are imminent this decade. He criticizes the UK's reliance on nuclear deterrence as a response to such attacks and highlights that NATO allies might not automatically intercept threats solely targeting the UK, as their systems prioritize their own defence.