You will need a cable needle and stitch holders.

You will also need 6(6, 6, 6, 7, 7, 7) buttons. Hayfield used Sirdar buttons #B5600-0120

Finished measurements:
Chest circumference: 41.75(46, 50.5, 54, 58.25, 62)“ 106(117, 128, 137, 148, 157) cm
Finished length: 26.25(27.5, 28.25, 29.25, 30, 30.75)” 68(70, 72, 74, 76, 78) cm
Sleeve to underarm: 18(18, 18.5, 19, 19, 19)“ 46(46, 47, 48, 48, 48) cm

Yarn used:
Hayfield Bonus with Wool Aran
Shade 997 Celtic Grey - 2(2, 2, 2, 3, 3) balls