The ever popular Monkeys by Cookie A. No-purl version and an eye of partridge heel. Just in case anyone wanted to know this is the stitch pattern
Row 1 (RS): Sl1, k1, sl1; repeat from to end.
Row 2: Sl 1 purlwise, p to end.
Row 3: Sl 1 purlwise, k1, k1, sl1; repeat from to last 2 sts, k2.
Row 4: As per row 2
It makes the finished fabric that little bit more cushioned on the heel, plus I think it's a little harder wearing too. I don't tend to wear my socks through but I like the extra squidge
I have already cast on for my next pair in the KAL - socks with owls on!