Derwent London, the new property company formed as a result of Derwent Valley's recent takeover of London Merchant Securities, it to put around £300m of London Merchant's portfolio up for sale. The properties, all situated outside central London, include the £80m Strathkelvin retail park in Glasgow and the Rotunda leisure development in Kingston. The company may also sell its 16 per cent stake in an opportunity fund run by Brockton Capital.