This 600 is not available until either the Humber Bridge has been reopened to cyclists, or I have rerouted the Perm to avoid the bridge. see Cycling UK response
Pull yourself together and complete your 'Wigley Super Perms' series by riding 'A Pair of Kirtons'. It is a 600 with everything; a climb over the Pennines, a crossing of the world's 7th longest bridge, a 10km dead straight ride over Holland Fen, and some marvellous 24 hour motorway services.
The Perm nominally starts from Poynton but you could start at any control if this is more convenient. The advantage of Poynton is that it has free car parking and you get the main climbing over with early in the ride. You also save the easy navigation bits for the night time.
Saddleworth Moor is the high-point at 492m with a long descent to Holmefirth. This road is called the Isle of Skye Road by locals, after the inn of that name that used to be here. It burnt down 50 years ago but there are no other landmarks on this bleak moor so the name has stuck.
After that, you head east onto the Yorkshire flat lands. Our destination is the spectacular Humber Bridge, a multimillion pound crossing from Humberside to nowhere (sorry Lincolnshire).
The whole of Lincolnshire now stretches before you with some inviting lanes. It's not absolutely flat, with a climb to Kirton in Lindsey at 55m. The amusingly named Chapel Hill is barely noticeable at 7m but the locals probably thought it was funny. Pause a while at Gainsborough Morrisons cafe.
Be warned; there's nowhere to hide on the dead straight Holland Fen, so if it's windy you will have your work cut out. You are aiming for Boston, famous for its Stump, a 24 hour McDonalds (including weekends) and a 24 hour ASDA (weekdays only).
Boston Stump, a prominent landmark in the Fens
The Boston-Stone section of the route has been designed with over-night riding in mind; the navigation is easy and there are 24 hour services at Colsterworth, Donington and Stone. If you time it right, you could even have a few hours sleep at the Colsterworth Travelodge.
Just save something in the tank for the stretch from Uttoxeter to Stone. It's a bit hilly, and while you would hardly notice on a shorter ride, with 250 miles in your legs it can certainly make itself felt.
The final leg back to Poynton calls at Prees Heath where you will find a favourite haunt, the Raven Cafe.