« Reply #38 on: Wednesday 14 October 20 08:12 BST (UK) »
Well I can beat that, I ordered a PDF birth for 1869 yesterday at 13.45 and I had a email today at 15.14 to tell me it is ready so that's just over 25 hours.
But I ordered mine on a Sunday afternoon, so wouldn't start being processed till Monday morning (say 9.00 am), so in terms of Working hours, I may just have nosed ahead 
But if GRO starts work at 8:00 am - you win

Berks / Oxon: Eltham, Annetts, Wiltshire (surname not county), Hawkins, Pembroke, Partridge
Dorset / Hants: Derham, Stride, Purkiss, Sibley
Yorkshire: Pottage, Carr, Blackburn, Depledge
Sussex: Goodyer, Christopher, Trevatt
Lanark: Scott (soldier went to Jersey CI)
Jersey: Fowler, Huelin, Scott