As Ukraine battles to hold lines, Trump may find Putin difficult to persuade

Despite huge numbers of casualties, Russian leader believes he is slowly winning war - so he can afford to string talks out

For Ukraine, the break in the frontline is unfortunately timed. Lightly armed Russian saboteur groups - three on one count - cut though Ukrainian positions in the Donbas countryside east of the key junction at Dobropillia. Though one group has been eliminated, as of Tuesday two were thought to remain at large - and although their numbers are small for now, perhaps 20 to 30, the breach is significant.

At the beginning of the year it was safe to visit Dobropillia, which had become a bustling market centre busy with soldiers and locals, nearly 15 miles north of the frontline in Pokrovsk. But since then the town, where once busy supply roads from Pokrovsk to Kramatorsk split, has come under sustained attack with glide bombs, while FPV (first person view) drones strike targets on the move.