Published to coincide with Princess' 150th birthday visit to London Paddington, the magazine details the history of the introduction of the world's first successful narrow gauge steam locomotives in 1863 and looks at the historical background of how the Ffestiniog Railway became the world's premier narrow gauge line.
The restoration of Metropolitan Railway Jubilee Carriage 353 at Boston Lodge is also covered, as is the 150th anniversary of the world's first underground railway.
As always, TLC contains stunning photography and is our largest-ever at 52 pages.
Available now at our shops and online, TLC3 is a compelling read whether you're a railway enthusiast or simply a fan of amazing scenery.
Check out the preview below for a taste of what's inside...