After getting a taste for these challenges from doing the previous one, I'm going to attempt this as well. It's a great idea for a challenge but I'm going to have to get on with it, as i know I'm going to run out of time like in the last one.
I was struggling to come up with any spaceship design, and then decided to limit myself to 2 cubes, 2 spheres and 2 plans.
Here's the idea that i came up with. Still obviously at the early concept stage, but I'm going to let the model and design evolve as i model and texture. It's going to be a Earthing Troop transport large enough to fit a large squad and deploy them in to the heart of battle.

Good luck to everyone taking part