I can only agree with that last sentiment there IanD. I came close to having Fort William to Mallaig as a silly gap, but on the forum bash up there (anyone happen to remember when that was? We had a 37 to Fort William, I remember that much, so 2004 or 2005 I would guess) I was persuaded to use food money to get on The Jacobite and get it in. Looking back, I'm well glad of that persuasion, not even got close to t'Bill since then, closest being Oban/Crianlarich in February 2006 and not any WHL trip since then either. Goodness gracious, I think it's time I got booking a berth to Fort William!
Trying to think what the one really annoying gap I had on my map for ages was now. Princes Risborough to Aylesbury took me forever to get in, but I've just remembered one of my biggest annoyances with my maps was having it suggested I got to Rose Hill Marple via Reddish South, rather than Hyde Central as it was. Took me 6 or 7 and a bit years to fix that! What the bit I was going to do once but got bowled out by some failure was Hambleton South to Hambleton West Junctions. Granted, it's technically non-passenger still but I was up there on a weekend with diversions that way going on. I'd been off to Hull on the HST from t'Cross, but due to delays caused by a trespasser my connection at 'ull was looking unlikely. So I bailed at Brough (got that track beyond there to Hull on a 222 but still not an HST!) and saw a 185 coming in and got excited it wasn't a 170 (memory tells me 6 and a half years later 185s were not super common at 'ull), so jumped on. Only forgetting of course that I was after a Northern train to Doncaster, and said train didn't go via Selby like my 185 was! Thankfully I could bail at Selby for a 158 to York, something then to Doncaster for the diverted train to Leeds then back to York for my B+B at silly o clock. Didn't seem sensible, so got to York and gave up, just as well as the guy running the B+B was falling asleep at half 8 in the evening. Imagine if I'd not got back to York until 8 minutes past midnight!
So in essence that was another bit I missed out on there, Hatfield and Stainforth to Goole. Missed out that bit twice now, the second time being after leaving my case on the train from Leeds at Goole on day 1 of my 7 day ALR, so had to completely change my plans to get it back. FINALLY got Goole to Hatfield and Stainforth covered on 2012's 14 day ALR, which was June 2012, 5 and a little years later after originally going to get it done!