Imperial offer or not?

Given you aren't far off the offer now I would think it was worth applying. Try and get your teacher to explain in your reference you were only 3 UMS off the A* in Physics as well. As far as I know Imperial still interviews for Chemical Engineering so you can try and impress them there and explain your school is tight on predictions.

Imperial will know that schools predict grades in very different ways so if they are impressed with the rest of your application they shouldn't turn you down for being one grade off in a prediction. My school basically just asked us what grades we needed and they'd predict us that - but any university knows going from an E to an A is really unlikely so they won't take it too seriously!

You're allowed five choices, as long as you're pretty sure you can get the grades for the others you can use Imperial as an optimistic choice. You wouldn't want to regret not applying

I am in the same position as you, except i am applying for Aero engineering. I hope they give me a chance

I get you, some schools just predict aimlessly. B to A*? Yeah, get the offer and then be surprised you didn't get it on results day....

I guess I should bite the bullet and apply, praying my reference is on my side. I imagine they would give me the standard offer of A*A*A?

I need A*A*A for imperial and my current predictions are A*AA, my school is very tight on predictions, I was 3 UMS off my A* prediction in physics. Could I get an offer for Chemical Engineering with a strong reference and ps?

Doing maths, chemistry and physics, got 4 's as AS with an A in bio which I dropped.
1A* 7A's 2 B's at GCSE (pretty turd)