Not so peaceful pipes

I've not been blipping for a few days due to having  a cold.  Today I was involved in one of my part-time roles and on a Teams call all day. We've also had problems with the central heating over the past few days. The pump had given up the ghost, so our plumber (who is also accredited to service boilers) replaced it. He then "hoovered" out a lot of gunge from the system but it is still gurgling and cutting out, so he's back tomorrow hopefully to sort it out. He asked me to send him a picture of the pipework at the top of the boiler, so I thought I'd share it with my fellow blippers as well.