ESMI, 50 Mark Lane, London. EC3R 7QR. United Kingdom. Registered in England and Wales No. 07915134. Registered Office, 4th Floor, Venture House, 27/29 Glasshouse Street, London, W1B 5DF. United Kingdom. ESMI is a trading name of Essential Supplementary Medical Insurance Limited. Essential Supplementary Medical Insurance Limited are an Appointed Representative of Compass Underwriting Limited who are authorised and regulated by the Financial Conduct Authority. FCA Registration 304908. Copyright © ESMI 2018. All rights reserved.