volatile economy. it comes after russia banned airlines from 36 countries from using its airspace in response to those international sanctions we have been discussing. a growing number of ukrainians living in britain are buying equipment and preparing to head for the front line. a military surplus supplier says 30 to a0 people a day are approaching him for kit. groups of men are apparently filling vans with equipment, before embarking on the 1,200—mile drive across western europe. our home affairs correspondent, tom symonds, has been meeting some of the volunteers for what's being called a new "international brigade". britain is not at war with russia, but in a corner of a london industrial estate, these guys are planning for it. they showed us the military supplies they've managed to buy up in recent days, old british army kit, not from the government, but supplied and sometimes donated by military surplus dealers.