§ Mr. Liddell-Grainger
To ask the Deputy Prime Minister what(a) planning and (b) other restrictions apply to utility companies seeking to lay pipes under bridges. 
§ Mr. McNulty
Statutory undertakers have certain permitted development rights set out in the Town and Country Planning (General Permitted Development) Order 1995 (SI 1995/418) ("the GPDO") that enable them to carry out development for the purposes of their undertaking without the need to make a planning application. Parts 15, 16 and 17 of Schedule 2 (development by the Environment Agency, sewerage undertakers and statutory undertakers) are likely to be relevant. These permissions generally do not permit the installation of pipes above ground, and they are subject to exceptions and conditions. Any development that goes beyond what is permitted by the GPDO requires planning permission. The office of the Deputy Prime Minister is not aware of specific restrictions that apply to the laying of pipes under bridges. Under the New Roads and Street Works Act there is a notification procedure between the statutory undertaker and the highways authority that deals with proposed works under the bridges.