They don’t like to use the ‘Q’ word in counter-terrorism. It’s a bit like blurting out the name of the Scottish Play in a theatre. At Christmas parties, members of the security agencies insisted they had never been busier but once the year had turned and they were no longer tempting fate, they were prepared to admit that 2018 was a bit ‘quieter’. There were, for instance, far fewer arrests for ‘attack planning’, as opposed to downloading or sharing instructional and propaganda material. Last year, there were only four foiled attacks and one unsuccessful vehicle attack on Parliament. Right at the last gasp, with three hours to go to New Year, a knifeman in Manchester stabbed a couple and a police officer, but did not kill anyone.