Back in the day, I came south from Inverness on the Chieftain which was diverted via Aberdeen. This of course meant that by the time it got to Edinburgh most of that day’s ECML diversions had come off so “all” we got south of Edinburgh was Abbeyhill and Hertford. Had the day’s other work overrun, we would have had Leamside and Sleaford as well (never got Leamside). That is topped by my parents who once endured (mother)/ enjoyed (father) Bristol to Edinburgh via Oxford, Cannock, Manchester, Settle and Cumbernauld. About the only bits of the normal route covered were New Street station and Carlisle to Carstairs.09:37 (+29 minutes late) for a King's Cross to Inverness via Tyne Valley service in September 2023.
I'm guessing that Lincoln, Durham Coast and Tyne Valley diversions wouldn't happen on the same day anymore (if they ever did)?