My vote for the first line would be The Bluebell , checks to see whether Lee Has returned with my Tin Hat, don't think it will happen any time soon though.
Still need the tin hat - I've been chased by angry Bedwyn line
IET▸ commuters all the way from Newbury, and I'm just heading towards Hungerford now. I didnt stop at Kintbury, but that only seemed to make things worse...
On a serious note, I was also thinking Bluebell, but not the current line - Rather, as with MVR
S&T▸ 's post, the planned future extension from Horsted Keynes to Ardingly (trackbed already owned or leased by the Bluebell Railway) and beyond from Ardingly to Haywards Heath (currently in use for freight).
Before passenger service withdrawal in 1963, the Haywards Heath-Horsted Keynes line had been electrified in the 1930s, and reopening as an electrified heritage line has not been ruled out. More info in the links below:
https://www.bluebell-railway.co.uk/bluebell/extend.htmlhttp://www.rail.co.uk/rail-news/2015/bluebell-railway-planning-to-head-west/