I had my eye out for any emergency of the lean-to-the-right-hand-of the-knitter syndrome that had plagued my large Murano bag. I wondered if this was only a symptom of large projects and thought it worth giving it a try - I had bought 4 balls of this wool to play with.
I have been unable to any reference to this online but it is very hard to search for -'twist' 'lean', 'skew' and similar terms all bring up a range of standard knitting techniques.
Katherine who suggested the remedy!
I am enjoying this pattern, so decided to make one bag before I started felting.