Russia will need to push Ukrainian forces further back and expand what it regards as a "buffer zone" if Kiev takes delivery of advanced longer-range ATACM guided missile systems from the United States,

The Kremlin said on Thursday that deliveries of U.S. long-range Army Tactical Missile Systems (ATACMS) to Ukraine would not change the outcome of the war but would create more problems for Ukraine itself.

The UK's military chief told the FT that Ukraine's "ability to continue deep operations" inside Russia will increasingly become a feature of the war.