Guild Wars 2

I’m going to be traveling to the UK for a few weeks soon and was wondering if there would be any issue playing while I’m there? (security wise or other)

There should not be any problems. Your login info is the same no matter where you travel. The only issue you might run across is authorized networks since it would be a new IP. In that case you should receive an email asking to authorize. Then all you need to do is authorize the new IP by following the link in the email.