About us Corporate Friends David Lock Associates David Lock Associates (DLA) is an independent town planning and urban design consultancy, who have been based in Milton Keynes for over 30 years. With extensive industry expertise, a flair for innovation and a focus on excellent design, their projects help to deliver infrastructure, transform economies and evolve the geography of towns, cities and sub-regions. DLA’s motivation is their desire to deliver great and sustainable places where communities can grow and prosper. “We have been supporting the Forest of Marston Vale with their tree planting for a number of years and were delighted once again this year to plant over 300 trees – as part of our ongoing commitment to lower our carbon impact.”