Mandatory GHG
Reporting 2017

Mandatory GHG Reporting 2017

BAE Systems has published a breakdown of our GHG emissions in our Annual Report 2017.

The majority of our greenhouse gas emissions come from the energy we use across our facilities. The Group’s greenhouse gas emissions decreased by 8% in 2016 largely due to reductions in energy usage at some of our larger sites.  Improvements to energy management across the estate support this downward trend, but factors such as milder weather and changes to operating profiles can contribute significantly depending on the site in question.

Greenhouse gas emissions data from 1 November 2016 to 31 October 2017 (tonnes CO2e)


Image of 2017 Mandatory GHG Reporting


The greenhouse gas emissions data is reported in line with the Greenhouse Gas Protocol Corporate Accounting and Reporting Standard ‘Operational Control’ approach, and emission factors for fuels and electricity are published at

The CO2e associated with carbon dioxide, methane and nitrous oxide is reported. Greenhouse gas emissions associated with hydrofluorocarbons, perfluorocarbons and sulphur hexafluoride are estimated to be immaterial to total emissions and are, therefore, not reported.

The principal record of the Group’s worldwide facilities is its legal department’s Global Property Database.

Greenhouse gas emissions are primarily calculated from energy consumption records reported via the Group’s global environmental database. Where actual usage data is not available for facilities and residences within the Global Property Database, an estimated consumption is used based on the type of building.

Greenhouse gas emissions related to business travel include air travel data for the majority of the global business and rail data for business units operating in the UK and US. These data are taken from travel suppliers’ procurement records.

Emissions from joint ventures and pension scheme properties not occupied by the Group are not included. Where a business or facility is acquired during a reporting year, it will be included in our reporting in the next full reporting year after the change.

The Scope 2 greenhouse gas emissions associated with the Greenhouse Gas Protocol ‘market-based’ method have been calculated as 592,745 tonnes CO2e. Supplier-specific emission factors have been sought for our most significant operating regions, but were either deemed of insufficient quality to use at present or were unavailable. Therefore, in line with the Greenhouse Gas Protocol guidance, this figure has been calculated using residual-mix emission factors where available for our UK and US operations. In our other significant operating regions, residual-mix emission factors are either unavailable or the resulting absolute emissions at Group level are within the margin of error and, therefore, the latter has been used.


1 See Deloitte LLP assurance statement at

2 Excluding share of equity accounted investments.