Boris Johnson has warned Russian President Vladimir Putin that a further incursion into Ukraine would be a “tragic miscalculation” as they finally held their delayed call.
The prime minister expressed his “deep concern” about Russia massing an estimated 100,000 troops on the Ukrainian border when they spoke on Wednesday afternoon.
It comes as Typhoon jets were scrambled on Wednesday to intercept four Russian military aircraft approaching the UK.
The jets, launched from RAF Lossiemouth in Moray, Scotland, were joined by a Voyager air-to-air refuelling tanker from RAF Brize Norton in Oxfordshire.
An RAF spokesperson said “four Russian Bear aircraft” were “intercepted and escorted”. At no point did they enter UK airspace.
Meanwhile, the United States is deploying 3,000 troops to Europe within “days” to bolster the Nato alliance and deter Russian aggression, according to media reports.
An anonymous US administration official told the Associated Press that around 2,000 troops were being sent to Poland and Germany this week, and roughly 1,000 Germany-based soldiers will be moved to Romania. The Wall Street Journal said troops were going to Germany, Poland and Romania.