As you are probably already aware, Greece has introduced temporary capital controls to limit the movement of currency out of the country.  The Department for Business Innovation and Skills has now published guidance for businesses, which is available at on Gov.uk at:

Guidance for businesses: https://www.gov.uk/government/news/greece-has-introduced-temporary-capital-controls-guidance-for-businesses

Advice for UK citizens and businesses: https://www.gov.uk/government/news/greece-updates-advice-for-uk-citizens-and-businesses

The Chancellor’s Statement: https://www.gov.uk/government/speeches/chancellors-statement-on-greece

The National Business Support Helpline is also able to help businesses with general queries or concerns about finance and can provide contacts details for legal assistance in market.  The Helpline will also be sharing this guidance via the Helpline Twitter Channel and Facebook page.