British churches on terror alert: UK police issue dramatic warning to Christian places of worship following ISIS murder of elderly priest in France during morning mass

Security was increased at the country's 47,000 churches after an 84-year-old priest was beheaded by Muslim fanatics in France. 

The killing in Normandy was the first known attack claimed by IS inside a church in the West after compiling a hitlist of places of Christian worship. It has emerged that Adel Kermiche, one of the two French teenagers killed by police after carrying out the morning slaughter - filmed on a mobile phone - told a friend two months ago: 'I'm going to do a church.' Inset: Westminster Abbey