Greece has announced that they are introducing capital controls on the movement of currency. If you trade with Greece, or you rely on suppliers there, you may find that you are directly affected by the situation.
A news story has been published on gov.uk as a central point of information and advice for people and businesses on the latest developments in Greece. This will be updated on a rolling basis and can be accessed at the following link: https://www.gov.uk/government/news/greece-updates-advice-for-uk-citizens-and-businesses