live from london. this is bbc news. ukraine's most senior security official tells the bbc the country is ready to launch its long—expected counter—offensive against russian forces. long delays for some passengers travelling to the uk — a nationwide issue with the border force system leads to problems with e—gate passport controls. it's the final day of campaigning in turkey ahead of one of the country's most divisive presidential elections where the economy and immigration are key voter concerns. ukraine's most senior security official has said the country is ready to launch its long—expected