This is the onsite workshop at Legoland Windsor where they fix, refresh and make (some of) the models across the site. In the workshop are various broken, old, new and part-completed models. Mainly for Miniland, but also other parts of the park.
The tubes are ventilation tubes, as the Lego models are glued and these tubes take the fumes away.
This cabinet contains a range of models, mainly heads and vehicles.
Note the drawing on the bottom left that was used to help plan the lego model next to it.
You can also see a small Lego version of the Atlantis ride submarine.