You will need a cable needle.

You will also need 5(5, 5, 6, 6, 6) buttons. Hayfield used Sirdar button # B5611-0785

Finished measurements:
Chest circumference: 45.25(50.75, 54.25, 58.75, 62, 66.25)“ 115(129, 138, 149, 157, 168)cm
Finished length: 22(22.75, 23.75, 24.5, 25.25, 26)” 56(58, 60, 62, 64, 66) cm
Sleeve to underarm: 16(16, 16.5, 17, 17, 17)“ 41(41, 42, 43, 43, 43) cm

Yarn used:
Hayfield Bonus with Wool Aran - 2(2, 2, 2, 2, 3) balls