My goodness I adore this pattern! The cardigan in particular but I have a soft spot for the jumper too. I just love garter stitch and I think it's so often over looked but for me, the lace detail just elevates it. Absolutely spot on.
Originally knitted in the gorgeous King Cole Paradise Beaches DK, an incredibly soft acrylic yarn that's a favourite for garments. It would also be gorgeous in the Sirdar No.1 DK, an acrylic/nylon crepe yarn with great stitch definition for the garter and the lacework.