Some mods as follows:
Mod for back cable - I mirrored the 4 cables at the back.
Mods for collar to work a round collar - starting from the button band, pickup 99 stitches. Work 1 by 1 rib (k1,p1) to last stitch, k1. Work rows in pattern to 2.5cm. do a right side button hole. Continue work in pattern until the collar reaches 5cm. Bind off in pattern.
Mods for the sleeves -pick up 71 stitches, 35 each side of the armhole with 1 from the centre shoulder seam. Set up row, k28, pm, k1, P2, k9, P2, k1, pm, k28. Start shaping on the 9 row and repeat every 8th row. Reduce to 43 stitches and 29 garter ridges before starting cuff.