CAA Skyway Code Version 3 | Published: 01/04/2021
The UK CAA have released version 3 of the Skyway Code.
This release includes updates to aeronautical information such as monitoring frequencies and squawk codes, and developments in Electronic Conspicuity, amongst other changes.
I believe reviewing this information is a useful exercise whether or not you have a Skill Test or Proficiency Check coming up.
An overhead join diagram is depicted on Page 103 and may be useful when considering an overhead join from the dead side.
Link: CAA Skyway Code