Replacing Tracks Inside The Clayton Tunnel

Network Rail had a blockade on the Brighton Mainline to replace life-expired tracks inside the Clayton Tunnel - a well known landmark down in Sussex. So I went for a look to see how it's done, and got to go for a walk inside the tunnel too! Brighton Mainline Improvement Project Page : www.southernrailway.com/travel-information/plan-yo… The Clayton Tunnel Crash from 1861: en.wikipedia.org/wiki/Clayton_Tunnel_rail_crash My thanks to Chris (as always!) and everyone from Network Rail for inviting me along, it's always a priviledge to be able to go on site visits like this.