Hopefully someone who is outside the US and lists will come along to answer your questions..however, out of curiousity are you listing on the US site or the UK site ( [URL removed] ). I am not sure if there would be a difference if you try listing through the UK links.

Like I said, I do not know the difference in listing from another location, but for [URL removed]

I would go to

Update Items As Group
Click on Shipping
Click on Clear International Shipping Prices (or click on Clear Domestic Shipping)

I would then Click on Add international shipping service.

Once you do this, a section opens [URL removed]
Click on Add Flat Rate

Add the rates by areas…since you do not use Calc by USPS you will have to use Flat Rates (unless, from your point of view in UK, it is a different option)

Then select all items and click on Apply Changes

This should reset your shipping

Here are some screen shots, that I posted for another seller (US) who wanted to make changes in International shipping..

Hope this helps

[URL removed]