The Government recognise the potential for significant impact of underwater noise from unexploded ordnance (UXO) clearance on vulnerable marine species and is taking active steps to manage and reduce the risk. Two phases of a Department for Business, Energy and Industrial Strategy (BEIS) funded project to characterise and contrast the acoustic fields generated by UXO clearance using high order detonation and using low-order deflagration have been completed and reported on. A third phase is now almost complete, further improving the information base and assessment of the clearance options.

Further research is now required to determine if the low-order deflagration and similar techniques are transferable to the offshore marine setting where partially-buried and decades-old explosives and variable environmental conditions can pose greater challenges for successful low-order clearance operations. The fourth phase of BEIS funded research is currently planned around several proposed UXO clearance campaigns. The trials at sea aim to characterise the resulting noise and chemical contaminant releases in the marine environment and to determine whether the technologies are safe and effective. This work is scheduled to take place over the summer and autumn of 2021 and is expected to report in Q1/2 2022.

The Government recognise the potential for significant impact of underwater noise from unexploded ordnance (UXO) clearance on vulnerable marine species and is taking active steps to manage and reduce the risk. Two phases of a Department for Business, Energy and Industrial Strategy (BEIS) funded project to characterise and contrast the acoustic fields generated by UXO clearance using high order detonation and using low-order deflagration have been completed and reported on.

It is our understanding that there is no appreciable distinction between the deflagration technique used by commercial and military clearance of marine UXO.

A third phase has now been initiated to further improve the information base, allowing further assessment of the clearance options. A potential 4th phase of the work involving offshore field work is also being actively explored in which comparative noise measurements would be made during actual UXO clearance campaigns using both deflagration and high order detonations. This would require cooperation and active support from industry (windfarm developers) and the regulatory authorities.

The outcomes from the 3^rd and 4^th phases would allow an informed discussion and consideration of the adequacy of evidence by regulatory authorities and the Statutory Nature Conservation Bodies.

The Government recognise the potential for significant impact of underwater noise from unexploded ordnance (UXO) clearance on vulnerable marine species and is taking active steps to manage and reduce the risk. Two phases of a Department for Business, Energy and Industrial Strategy (BEIS) funded project to characterise and contrast the acoustic fields generated by UXO clearance using high order detonation and using low-order deflagration have been completed and reported on.

A third phase has now been initiated to further improve the information base, allowing further assessment of the clearance options. A potential 4th phase of the work involving offshore field work is also being actively explored in which comparative noise measurements would be made during actual UXO clearance campaigns using both deflagration and high order detonations. This would require cooperation and active support from industry (windfarm developers) and the regulatory authorities.

The outcomes from the 3^rd and 4^th phases would allow an informed discussion and consideration of the adequacy of evidence by regulatory authorities and the Statutory Nature Conservation Bodies. It will be for the regulatory authorities and the Statutory Nature Conservation Bodies to consider the best available scientific evidence when providing advice on these matters.

The Government recognise the potential for significant impact of underwater noise from unexploded ordnance (UXO) clearance on vulnerable marine species and is taking active steps to manage and reduce the risk. Two phases of a Department for Business, Energy and Industrial Strategy (BEIS) funded project to characterize and contrast the acoustic fields generated by UXO clearance using high order detonation and using low-order deflagration have been completed and reported on.

A third phase has now been initiated to further improve the information base, allowing further assessment of the clearance options. A potential 4th phase of the work involving offshore field work is also being actively explored in which comparative noise measurements would be made during actual UXO clearance campaigns using both deflagration and high order detonations. This would require cooperation and active support from industry (windfarm developers) and the regulatory authorities.

The outcomes from the 3^rd and 4^th phases would allow an informed discussion and consideration of the adequacy of evidence by regulatory authorities and the statutory nature conservation bodies (SNCBs). It will be for the regulatory authorities and the SNCBs to consider the best available scientific evidence when providing advice on these matters.

The Department’s contractor for provision of project management for the maintenance of Strategic Environmental Assessments, Hartley Anderson Ltd, commissioned the National Physical Laboratory for this project. Funding for financial year 2019-2020 totalled £221,000 (excl. VAT), which includes third party costs for munition manufacture and experimental site hire.

The funding allocated to this project to date in financial year 2020-2021 is £7,500 (excl. VAT).

The Department does not assess or licence the clearance of unexploded ordnance for offshore windfarms. Licenses for the removal of unexploded ordnance are issued by the Marine Management Organisation which sits in Department for Environment, Food and Rural Affairs (Defra). As part of their licensing process they assess environmental and other issues related to the proposed clearance.

As part of the Offshore Wind Sector Deal, published on 7 March 2019, the department and Defra are working closely with the sector and wider stakeholders to address strategic deployment issues associated with offshore wind.

The Department does not assess or licence the clearance of unexploded ordnance for offshore windfarms. Licenses for the removal of unexploded ordnance are issued by the Marine Management Organisation which sits in Department for Environment, Food and Rural Affairs (Defra). As part of their licensing process they assess environmental and other issues related to the proposed clearance.

As part of the Offshore Wind Sector Deal, published on 7 March 2019, the department and Defra are working closely with the sector and wider stakeholders to address strategic deployment issues associated with offshore wind.