Rainbow liveried 444019 has managed to elude my camera for ages but it finally turned up in the right place at the right time on 2 March 2023. The unit was paired with 450004 on 1W31, the 15:35 Waterloo to Weymouth, seen here passing Potbridge, west of Winchfield, just before the shadows became problematic.
PHOTO DATA FOR IMAGE 23-D-0199
camera : Nikon D610
lens : 70-200mm f/2.8
focal length : 130.0 mm
shutter : 1/800 sec
aperture : f/8.0
ISO : 320 ISO
original : Digital: 24MP NEF
SUBJECT DATA
Loco / Unit : 444.019, 450.004
Train : 1W31, 15:35 London Waterloo - Weymouth passenger