(ShareCast News) - Strat Aero, the drone aircraft services specialist, has won a £2.5m contract extension with the Environment Agency to aerially monitor the tidal flood defences of the Thames Estuary via its unmanned aerial vehicles.The contract, to provide both aerial inspection and level survey services for the EA's Thames Estuary Asset Management 2100 (TEAM2100) programme, is expected to deliver roughly £1m in revenue to Strat Aero over the next 18 months, depending on finer details.TEAM2100 is a 10-year capital investment plan that aims to reduce the risk of tidal flooding by replacing and refurbishing the tidal flood defences between Shoeburynes and Isle of Grain at the mouth of the Thames to Teddington in west London.Strat Aero chief executive Iain McLure said: "To be chosen for such an important role in protecting the UK's capital city is an enormous honour and one which reflects our growing reputation as the UAV topographic and hydrographic surveying, inspection and engineering services provider of choice."