From the Knit Rowan website:
Knit this stunning fairisle slipover, the member’s exclusive free pattern for September 2015. Designed by Marie Wallin and worked in Rowan Tweed and Colourspun this intricate colourwork design would be suitable for the more experienced knitter. Note that the crochet hook is only used to make the tie cord.

This FREE pattern is available to members of the Knit Rowan website:

Finished dimensions:
46.5: 51.5: 57: 63: 70.5 cm
18½: 20½: 22½: 25: 28 inches

Yarn information:
Rowan Colourspun
A - Buttertubs 270
3, 3, 3, 4, 4 skeins
444, 444, 444, 592, 592 yards

Rowan Tweed
B - Hubberholme 589
1, 1, 2, 2, 2 skeins
129, 129, 258, 258, 258 yards

C - Settle 597
1, 2, 2, 2, 2 skeins
129, 258, 258, 258, 258 yards

D - Tissington 600
1, 1, 1, 1, 1 skein
129, 129, 129, 129, 129 yards

E - Wensley 590
1, 1, 1, 1, 1 skein
129, 129, 129, 129, 129 yards

F - Bedale 581
1, 1, 1, 1, 1 skein
129, 129, 129, 129, 129 yards

G - Reeth 596
1, 1, 1, 1, 1 skein
129, 129, 129, 129, 129 yards

H - Keld 583
1, 1, 1, 1, 2 skeins
129, 129, 129, 129, 258 yards

I - Bainbridge 588
1, 1, 1, 1, 1 skein
129, 129, 129, 129, 129 yards