GBRf has a number of locos painted in liveries representing major customers but it seems unusual to find them actually hauling that customer's trains. At least on 24 May 2023 Cemex liveried 66780 could be photographed shortly after passing Cemex's quarry at Peak Forest as it headed for Hindlow with 6H88, the 08:13 stone empties from Hams Hall.
PHOTO DATA FOR IMAGE 23-D-0919
camera : Nikon Z6ii
lens : 24-120mm f/4
focal length : 93.0 mm
shutter : 1/800 sec
aperture : f/8.0
ISO : 180 ISO
original : Digital: 24MP NEF
SUBJECT DATA
Loco / Unit : 66.780
Train : 6H88, 08:13 Hams Hall - Hindlow stone empties