Brickwork

I don't know a lot about brickwork, although with my I-Spy book (remember those?) I could identify English bond (these walls), Flemish bond and stretcher bond. But, despite passing this building thousands of times (literally - a countable 2,700 and uncountable more), I've never registered the angled brickwork on this chimney before. I have no idea whether it is a standard way of building a tapering chimney.

Any brickies out there who can tell me more?

I'm still gently coming down from yesterday. Ground within sight now.