Not sure about that.. I have tried online ever since leaving uk in December and the website recognises that I am not in uk and will not let me proceed.
Something to do with the taxes in the country from which you purchase the tickets. I believe Spain will take about 20% of any lottery winnings if bought there.
I have the same problem. I can't even log in to check the occasional win after an email when abroad. There was a thread on the NHS AAA (Aneurism) test recently and I couldn't get into that site. Even these "hide your ISP address" sites don't get me through although they work for some things in the UK.