In the north a 50,000-strong Russian force is attacking Sumy, a provincial capital. Our model is detecting artillery fire and explosions along the city’s northern defensive lines. Ukraine is badly outnumbered but officials say the front is holding.

Russia’s attacks on Ukraine are escalating, both on the front lines and across urban centres. Ben Hall, the FT’s Europe editor, talks to military analyst Franz-Stefan Gady about Ukraine’s battle to hold onto territory until a ceasefire can be agreed. Clips: Channel 4; ABC

Russia’s summer offensive signals Putin’s determination to overwhelm Ukraine using mass drone warfare, motorcycle assaults, and Chinese tech support, while betting on scale, endurance, and Western hesitancy to act.