Security alert

An emergency alert was sent across UK on 23 April. Picture: Cabinet Office

UK emergency alert fails to go off on all phones - why

'Rather than reminiscing over cups of tea, there will be silence as aged fingers are swiped over screens'. PIC: PA Photo/thinkstockphotos

Millions of Brits to take part in ‘Armageddon alarm’ test within weeks

US Embassy in London in 2018. (Photo by Leon Neal/Getty Images)

US Embassy in London put into lockdown following security alert