That chippy was on Portillo's Great Railway Journeys with the Bradshaw guide book. They claim to use a recipe handed down from the Victorian era.
Of course if Rich or Mrs Rich worked in the creative industries I would be able to recommend a members club in the vicinity which I'm sure he'd like.
Last 2 times I went Hawksmoor it was trash. Prefer Tramshed or MASH but MASH closed down and moving location.