UK/US Shoe sizes?

Hi there I'm hoping somebody can help me out here.

After spending time in the US I grew very fond of American style clothing and shoes.

Well I've now been back in the UK for a while now and my US shoes have worn out and I want to buy some new ones that are similar to the ones I had.

UK Shoes/trainers seem to be narrow and long

US Shoes/trainers are wide and more rounded

Where can I find proper US wide sized shoes in London?

I have been to a few US stores here in London like Skechers and Oakley I didn't find what I was looking for, so what I was wondering, have the shoes shape here been changed for the European market?

I just want normal US sized shoes that haven't been messed with to suit the European "fit"

I hope somebody knows what I'm talking about.