Ukrainian drones struck deep inside Russia overnight, setting fire to a Wildberries distribution hub at Koledino, 25 miles south of the Kremlin, in an attack the Daily Mail reports involved British-made drones for the first time. Wildberries is Russia's largest online retailer, sometimes described as the "Russian Amazon."

The report does not identify the drone model or confirm that the UK government authorized its use.

Hypothesis: the strike marks a new rung on the West's escalation ladder, testing how far allied governments will let Kyiv use their hardware against targets deep inside Russia. Supporting this: Western capitals have historically restricted Ukraine from firing supplied long-range weapons deep into Russian territory, wary of provoking a nuclear-armed adversary. Against this: the source gives no confirmation of formal UK sign-off, and a single strike does not establish a change in declared policy.

What to watch: whether London or Kyiv confirm the use of British-made drones, how the Kremlin characterizes the strike, and whether further deep strikes follow.