Who's Harry Beck Dad?

Dad and lads glance up at celebrity GBRf Class 66/7 No. 66721 'Harry Beck' with a map of the London Underground as a livery, designed by the afore mentioned gentleman. It is sitting in the Up Goods Loop at Blea Moor to allow passenger traffic to pass before proceeding south with 6M37, the 11:25 Arcow Quarry – Bredbury Tilcon loaded aggregate working on 30th May 2018.