I think you need to reframe this as having failed to secure your degree in the UK vs being a transfer per se, and that you are pursing a another different, degree. Hopefully some of your physics and maths classes would be applicable, but also check for credit for your IBD if that still counts 4 yrs later. If applicable, the IBD would count for 30 credits at IB friendly unis like Utah and might cover quite a few GEds. What does the UK offer in the way of options?