57304 on Thunderbird duties

Diesel locos of the UK rail network, including both modern and vintage traction still in mainline use today.
One of the DRS operated class 57 Thunderbird locos passes Linslade on route to London Euston, having departed Rugby earlier that morning. EOS-1d MkIV,70mm, ISO400, f5.0, 1/640 : (25/01/2016)

59001 looking sparkly..