Can the I pod be used only on the .com website or will I also be able to use it on the .co.uk website to dowload apple tunes etc

You can try checking the FAQ's on apple's web site. If they don't have the answer listed there, you can email support with your question. They generally respond within the next business day.

The iTunes sites are set up by country. Your geographic location and method of payment and your input will determine if you access iTunes through the British or US site. The US site will work in Briton and the British here in the US with a account previously set up to access the site.

Yes