The article didn't mention what is by far my favorite British lingo: "faffing about". It's just so damn useful! I know that there are other phrases which work, but for whatever reason none of them really hit for me like "faffing about" does.
I feel like my role in the comments here is to add a Scottish flavour - what we'd say where I grew up (South Aberdeenshire) rather than "faffing about" is "footering about"
A good example of 'faff' is when you join a queue, get to the teller and they tell you a) you needed to take a number and/or b) you're in the wrong line.