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	Welcome From Derwent Sash Windows. Please Enjoy Your Visit.
	We are 'Preferred Installers' for Masterframe™. We recommend The Bygone Collection™ everytime.				The Energy Efficiency Trust® Approved Window. Energy Efficient Windows Could Save 3.5 Million tonnes Of CO2 a year.
	The reason is straightforward. It is the appearance of them - realistic and authentic.
	Added are the facts they are robust, low maintenance, and comply to the new energy-efficiency regulations.
	See below for more detailed information about The Bygone Collection™.