I amended the pattern to remind me that for this particular pattern, the stitch left on the needle after casting off, appears to not be counted in the next bit.
I feel a bit more relaxed now and will hopefully finish it off tomorrow.
One of the neighbours out back had people around last night. Thankfully no music but very loud laughing and shouting. I shut the window at 01:00 as they were driving me nuts. They are a household of three and there were way more voices than that.