How to operate a lock on a canal as a narrowboat user. How to go through a canal lock

If you are new to boating on the inland waterways, going through a lock feel like a daunting prospect. This video will equip you with all the knowledge you need to go up and down in a lock safely and with courtesy to other boaters.
A special thanks to Chris Bennett and ‪@TingdeneMarinasBoatSales‬ for all their help in putting this video together.
Watch this video to find out:
00:30 // How to go downstream in a lock
04:45 // Where to position your boat in a lock - what is the cill marker?
05:29 // What to think about when approaching a lock. What to look out for when going into a lock.
06:51 // How to go up in a lock. How to go upstream in a lock.
08:34 // Can you share a lock with another boat?
09:31 // What should I do if the lock gates are closed, there is a queue, or the lock is not set in my favour?
14:47 // Health and safety around canal or river locks