The Yesterday channel has a new show Secrets of the London Underground. Based on the first two episodes, covering the never-opened North End station and abandoned bits of Holborn station, it’s very much recommended. Plenty of history even enthusiasts might not know about.
On 1st December 2015 Transport for London (TfL) unveiled its new design bible, the Design Idiom. Though the name may sound grandiose, the goal is simple: create a document that captures the design aesthetic of the Underground, so that good design can help drive decision-making at London Underground.
The document itself can be found here (PDF), and I whole-heartedly recommend reading through every part it. It’s an excellent example of a set of design guidelines that isn’t touchy-feely and alight with cockamamie buzzwords. Instead, it is the product of proper research that provides concrete examples of how to implement each high-level concept. In essence, it explains why the guidelines matter.
The article is great, too.