Company Overview

Medical & Commercial International (MCI) specialises in underwriting international liability risks.  Its management and underwriting team have extensive experience of the international insurance market and have worked with companies ranging from start-ups to some of the largest corporate and public entities in the world.

MCI’s aim is simple – to create a market leading underwriting-led proposition with longevity and specialist knowledge at the centre of everything it does.

Why we’re different

  • MCI provides flexibility and high quality service levels through upper quartile, empowered underwriters
  • Broad underwriting authority in the hands of front-line underwriters with the in-depth sector experience to make it count
  • Capacity providers with financial security and licensing to the highest standard
  • Longevity and depth of relationships with clients and brokers with the ability to back this up formally through long term agreements
  • We only partner with capacity providers and third party adjusters with established claims management track record


MCI – Syndicate 1902

Medical & Commercial International (MCI) has received ‘in principle’ approval from Lloyd’s to underwrite business incepting on or after 1 January 2022.

Further information can be found here: MCI SIAB Press Release


Lloyd’s Part VII Transfer

Lloyd’s of London transferred certain EEA insurance policies to Lloyd’s Brussels at 1st January 2021.

The transfer will not change terms and conditions of any policy, except that Lloyd’s Brussels will become the insurer and Data Controller in respect of the transferred policies.

Further information about the transfer including: whether it could affect your pre-transfer position, which policies are transferring, your rights and what you need to do can be found at


Broker Trading Notice

With effect from 17th September 2020, MCI concluded a management buy-out from Castel Underwriting Agencies Limited. In order to ensure continuity for our clients the team will continue to service historic business (back to start of trading in May 2015) from an underwriting perspective.

If you have any questions about these changes please contact the team.