The correct variable-speed drive belt for the Little John Mk.1 and Mk.2 Models. These belts are high-quality, industrial-grade belts made in Europe.   An installation tip: The manual suggests swivelling the layshaft housing about bolt 'D'. However, a better solution is to remove the grub screw (at the rear) securing the shaft to the housing; the housing can then be slid off the layshaft allowing it to move further, thus giving enough clearance to remove & refit the belt.
The later "Raglan 5-inch" belt is different and listed separately here
The belt for the Raglan milling machine is listed here