ABBREVIATIONS
k: knit |  p: purl  |  R: row | st(s): stitch(es)  | sl: slip a st without working
MC: main colour  |  CC: contrast colour
Sl all sts purlwise (unless otherwise stated)
RS/WS: right-side / wrong-side facing
brk: brioche k also known as bark, k st (that was sl in previous row) together with its yarn over.
brp: brioche purl also known as burp, p st (that was sl in the previous row) together with its yarn over.
sl1yo following a k or brk st: (sl 1 yarn over) bring working yarn under needle to front of work, sl next st purl-wise, then bring yarn over needle (and over sl st) to back, in position to work following st.
sl1yo following a p or brp st: (sl 1 yarn over) working yarn is already in front, sl next st purl-wise, then bring yarn over needle (and over sl st), then to front under needle, into position to work following st.

DC: dark colour, use the dark coloured yarn
LC: light colour, use the light coloured yarn