Just had a look at the Philips Navigator Truckers version daughter bought for my birthday.
2022 updated.
London approaches area covered far out as, clockwise, Bushey, Barnet, Loughton, Barking Chiselhusrt, Mitcham, Surbiton, Sunbury, Southall, Northolt, Pinner, all on 4 x 11" x 14" pages.
Plus 2 same size larger scale pages of central hell, sorry, london istelf.
Haven’t a clue what the acronyms you both mention are just letting you know the coverage of what is probably the latest edition.
Personally i prefer AA maps for reading and planning but not even sure if they still offer the large scale truckers atlas.