It's not often you get an entire class of locos on a single train. The three operational class 436s, Crossrail's 436.114, 436.112 and 436.115 were at the head of a northbound intermodal, photographed leaving the Wattinger Tunnel on 29 August 2012.
PHOTO DATA FOR IMAGE 12-D-2030
camera : Nikon D700
lens : 28-70mm f/2.8
focal length : 34.0 (34mm 35mm eq)
shutter : 1/640 sec
aperture : f/8
ISO : 200 ISO
original : Digital: 12MP NEF
SUBJECT DATA
Loco / Unit : 436.114 (XRAIL), 436.112 (XRAIL), 436.115 (XRAIL)