Change of https://www.gov.uk/guidance/tonnage-measurement-of-uk-ships-authorised-organisations

Change description : 2025-08-06 12:49:00: Updated address for MECAL Ltd. [Guidance and regulation]

Showing diff : 2024-08-16 07:48:07.887648123 +00:00..2025-08-07 22:48:54.449332567 +00:00

Guidance

Tonnage measurement of UK ships: Authorised organisations

This webpage provides a list of organisations authorised under UK legislation to conduct tonnage measurement and issue certification on UK registered vessels.

Update history

2025-08-06 12:49
Updated address for MECAL Ltd.

2024-08-16 08:48
Removed Burness Corlett Three Quays International Ltd from the list of small commercial vessel certifying authorities.

2024-02-23 09:03
Updated Merchant Shipping (Small Workboats and Pilot Boats) Regulations 2023. Minor change to table at section 2 (Mecal) and multiple addresses of tonnage authorities updated.

2022-08-23 14:47
We have added Section 2 (and the table). Added links to the regulations Updated address and contact information