To ask the Secretary of State for Transport what guidance her Department has given to local authorities on the safety implications of switching streetlights off early to reduce carbon emissions. (189141)

[holding answer 26 February 2008]: The Department for Transport endorses "Invest to Save", which is published by the UK Lighting Board in conjunction with the Institution of Lighting Engineers. This provides guidance to local authorities considering adopting energy saving measures such as dimming or switching off lights. The document can be found at Institution of Lighting Engineers website:

www.ile.org.uk

To ask the Secretary of State for Transport which local authorities in England (a) have undertaken and (b) are planning to undertake trials of part-night street lighting. (190767)

[holding answer 29 February 2008]: This information is not held centrally.