Waking Up a to Whale

It's not every day, my breakfast news includes an account of a small Minke whale being trapped in Richmond's lock (https://www.theguardian.com/environment/2021/may/09/small-whale-gets-stuck-at-lock-on-thames-in-south-west-london). The lock (a place where boats can move between areas with differing water depths) is well up the Thames river, in south-west London. The Minke, in question, was a young animal, around 3-4 m (the species can grow up to 10 m in length). The whale was stuck on the rollers that the lock has in place help move boats. The animal has been freed but will be assessed for injuries, before possible release out to sea.