I am about to undergo a teaching observation as part of my college’s inspections. Any advice, as I am increasingly uneasy about this.

Don’t kid yourself that this is anything new. What do you think happens each day? You are being observed by your students - and some of them can be highly critical. Remember, you are in effect a public servant in an increasingly monitored sector, so just do your stuff. None of us are good at our jobs all the time, but aim to make the lesson good and have evidence of planning to back up the session.