Memo to self, must try to keep the humour out of my posts in future! As I said before, 22ms was
not the total ping, just the first hop from my router to the first BT one. Every bit of latency adds up! Anyway DLM has now relented and reduced INP back to 3, which gives 15ms for the first hop out of a total of 25ms to bbc.co.uk at this quiet time of day.