Cardigan - you will need: 1 pair 4 mm (UK 8) knitting needles and 1 pair 3¼ mm needles (UK 10) and 80cm 3.25mm circular needle, stitch holders and 5 buttons.
Hat - you will need 1 pair 4mm (UK8) Knitting needles, 1 pair 3.25mm (UK10) knitting needles.
Scarf - 1 pair 5mm (UK8) Knitting needles.