Each source has different recommended yarns. These are from the King Cole version of the pattern.

Measurements
To fit chest sizes
60, 65, 70, 75, 80, 85 cm
(24, 26, 28, 30, 32, 34 in)
Finished measurement
74, 79, 84, 90, 95, 101 cm
(29½, 31½, 33½, 36, 38, 40½ in)
Length to back neck
39, 44, 48, 52, 57, 62 cm
(15½, 17½, 19, 20½, 22½, 24½ in)
Sleeve length
28, 31, 34, 37, 41, 44 cm
(11, 12, 13½, 14½, 16, 17½ in)

Materials
Big Value DK
2, 3, 3, 4, 4, 5 X 100g balls
Crown DK
4, 5, 6, 7, 7, 9 X 50g balls
Anti-Tickle DK
6, 7, 8, 9, 10, 12 X 50g balls
Cable Needle
5, 5, 5, 6, 6, 6 buttons.