Genesis Tour De Fer with a long wheelbase.
Lynskey Endurance carbon fork - disc brakes and a crown mount for lighting options.
Riding Ultegra groupset. 50/34 - 11/42. Wolftooth rear derailleur dropper.
TRP Spyre - cable actuated disc brakes
Pacenti TL28 rims 650b (on sale Planet X), Hope disc hubs RL4.
WTB Byways / Resolute tubeless.
Affordable finishing kit.
Decathlon clip on aerobars.
Cheap Chinese USB powerbank powered lighting.
Luggage - Cheap Chinese + Apidura + Topeak + Decathlon
Build came in at about £1500 - £1600