Question to the Department for Transport:

To ask the Secretary of State for Transport, what the (a) number and (b) gross tonnage was of (i) UK owned and (ii) UK registered offshore supply vessels in each year since 2000-01.

The Maritime and Coastguard Agency collates a record of vessels registered on the United Kingdom Ship Register (UKSR). It does not hold a record of shipping on the registers of other national administrations, which could include UK owned vessels.

As of 9 June there were 159 offshore vessels on the UKSR, totalling 556,975 gross tonnage. No historical record is held with the kind of breakdown requested for previous years.

Neither is a record held of where ships operate, and hence the vessels mentioned above may be operating worldwide, not just on the UK Continental Shelf.