Russia sending thousands more troops to Ukraine border

Move suggests Putin could extend crisis for weeks as Johnson and Biden agree crucial window for diplomacy' still exists

Russia is sending thousands more troops to its border with Ukraine in a sign that Vladimir Putin could extend the crisis for weeks, as Boris Johnson warned the situation had become very, very dangerous".

British officials estimate that a further 14 Russian battalions are heading towards Ukraine, each numbering about 800 troops, on top of the 100 battalions massed on the borders - a force already believed capable of launching an invasion.