HI, I'm a physio and I've worked a little with kids with club feet. There are two main types of club foot - postural and structural or fixed. The postural sort is just due to running out of room - there's nothing wrong with the bones etc, just the position of the foot when he/she comes out. That can be easily fixed with simple exercises/stretching. The structural sort is harder because it involves abnormal bony alignment along with tendon problems. There are various sorts of treatment but the sort I remember doing most was casting and taping.

Perhaps you could talk to your local physio in Horsham about this (or one at the hospital, I know you've got a few there)? They may know another local family who have been through this, or have treated another child so could give you some more information so it is easier to understand the treatment.

Sounds as though all else was well on the U/S though, which is great.