A group of Conservative MPs will attempt to force a Commons vote over a referendum on the UK's European Union membership next week.
The MPs are seeking to engineer a vote on an EU referendum by tabling an amendment to the Queen's speech.
Prime Minister David Cameron earlier defended his approach of seeking fundamental reform and holding a referendum on membership before the end of 2017.
Read more: Ex-chancellor calls for EU exit
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Kurt Cochran and his wife Melissa had been visiting London from the US to celebrate their 25th wedding anniversary and were due to fly home.
The Government has previously described the new coin - which enters circulation tomorrow - as "harder to counterfeit than ever before".
The European bloc said that Russia should release hundreds of people it arrested at anti-government protests and rallies.