Pattern mods:

I used a DK weight yarn and was not able to match pattern gauge. I decided to use a 3.0mm hook, which was the smallest I felt I could work with. The fabric created was a bit firm but it does make a lovely warm cardigan.

To compensate for my stitch gauge, I followed instructions for a size smaller than my actual size.

To compensate for my row gauge I added extra rows throughout.

My gauge:
18tr x 13 rows

Body - Worked total of 49 pattern rows
Arm holes - Added 4 extra rows as follows:
Right Front - Added 2 rows after shaping
Shape (Right) Front Neck - Added 2 rows after shaping
Shape (Right) Shoulder - Unchanged
Shape Back - Added 4 rows after shaping
Left Front - Added 2 rows after shaping
Shape (Left) Front Neck - Added 2 rows after shaping
Shape (Left) Shoulder - Unchanged
Sleeves - Worked 16 pattern rows before begin to match to body stripe colours
Sleeve Cap - Add 4 extra rows as follows:
Worked Row 1, then added 2 rows
Worked Row 2 & 3, then added 2 rows
Worked repeat as given