Intercropping with cauliflower

I started some cauliflower (all year round) in modules and they were ready for planting out this week. when I checked the spacing they reccomend 2' between them! I don't like chucking away good plants so I ended up filling my whole brassica bed with them. With such large spaces in between and some much time in the ground I'm keen to do some interplanting. Any reccomendations or things to avoid (brassica or otherwise)? NB I limed the bed early in the spring.

Caulis don't usually grow tall but their leaves do spread out over the bed. Maybe some taller things like toms, sweet corn, Brussel sprouts, leeks and climbing beans?

That's brilliant thankyou, I've got some toms and leeks in the greenhouse looking for a space.