I wasn't a 'basher' as such of the 18.14, it was just my (quite) frequent ride from Retford up to the Smoke in those days.
The excellent Chronicles of Napier has diagrams for the Deltics, this is for May '79-May '80:
Many thanks my friend, that does indeed answer my question. Couldn't see anything specific about actual observations (loco/train/date etc). I have a few such obbo's if they (the site owners that is, are still interested?), but to be honest, most runs I didn't make a note of the loco, but just sat back and enjoyed the journey.
My only ever foray in to the world of Main Line Deltic running, post BR service, was the (now) well documented run from Waverley to (err, Berwick, was it). Don't get me wrong, I do not criticise anyone/anything at all. The run North with a Brush 4 (IIRC?) was delayed for reasons I can not now remember, so a quick turn round was needed at Waverley. Some of us may have headed up the hill to a certain watering hole for a swift one, but may be that was another occasion?
Back on board, and the departure from Waverley (IMHO) was something else, as in acceleration etc, will never forget it, but by then many, myself included were already standing in the RMB/RB (whichever) with a pint on the go raising our glasses. The run was brilliant until a few miles short of the border, and despite the ale intake, many became aware we had been coasting for a few too many miles, and a look out the window to see flames spouting forth out the loco, had a very sobering moment on most of us!