Update from the Knit Rowan website:
Knit this ladies accessory mini poncho, a design from the Rowan archive that is now available as a free pattern to download. Designed by Lisa Richardson using the divine yarn Fine Art (merino wool, kid mohair and mulberry silk), this slip stitch poncho has a cozy collar.

Note: The KnitRowan website states that Martin Storey is the designer.

Finished side to side sleeveless width dimensions:
75.5: 81: 94 cm
29.5: 32: 37 inches

Yarn Information:
A - Rowan 314
2, 3, 3 skeins
874, 1311, 1311 yards

B - Yew 313
2, 2, 2 skeins
874, 874, 874 yards