Putin's recent use of an advance hypersonic missile in Ukraine should serve as a resounding wake-up call across Whitehall. These new advanced, long-range, air-launched weapons represent a profound leap in offensive military technology. Britain is woefully unprotected against mass drone and missile threats, including conventional intercontinental ballistic missiles (ICBMs). It is imperative that we establish an Israeli-style 'iron dome' system around London and other major targets capable of downing these new weapons and any other arms that Putin might intend to unleash. The world is becoming more dangerous, not less, and it is prudent to assume that London or other major UK cities could be targeted in the next five years. The UK must act decisively to modernize its air defence infrastructure.