News Update Costain plans to build its own solar farm – Costain is seeking planning permission to develop a major solar farm on disused land north of Heathrow. The proposed scheme on land owned by Costain since the early 1960s could generate 5.5MW of energy, enough to power around 1,650 homes. The 37-acre site, near Sipson Road and Holloway Lane in the London Borough of Hillingdon, [] http://ow.ly/2EZaFk