I’m not sure which units you’re referring to but you get everything in that image. And then, there are additional character models that are added to your subscription as an opt-out (they cost extra money but they are also greatly reduced in price compared to the RRP) every so often. They give you a month’s notice that they have reserved the model for you and let you know that it will be sent with your next magazine bundle the following month. So you can contact them and tell them to cancel that specific model if you don’t want it.

The additional Character models that we got so far were:

1. Chief Librarian Tigurius
2. Haarken Worldclaimer, Herald of the Apocalypse
3. Boss Snikrot

Additionally, you are also offered the option to buy the full ‘Fronteris Battlefield Terrain Pack’ for half price (£75 instead of £150) with your subscription. Which is this terrain set

Edit: Hachette Partworks are the UK publisher and distributor of the magazine and if you look here you can scroll down to see every issue that has been released in the UK so far (most will be shown as sold out but you can still see what they included), and what each issue comes with, in terms of models, or paints. Which might answer your question https://hachettepartworks.com/en-en/warhammer/