Left: BR Standard Class 7 4-6-2 no. 70000 Britannia
Right front: GWR Manor Class 4-6-0 no. 7822 Foxcote Manor
Right rear: LNER Peppercorn A1 4-6-2 no. 60163 Tornado
"Steel, Steam & Stars III", Llangollen Railway, April 2012. The two locos on the right are departing double-headed light engine.
The title is me being silly: it's a line from a song called "At the Gala" which seemed rather appropriate for steam engines.