The Fine Art Trade Guild provides general advice on hanging and safe-guarding your artwork here.  Also a description of the different levels of framing available to you:  www.fineart.co.uk/buying/Framing_Info_Advice.aspx 
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To see the vast range of frame mouldings available to you when deciding how to present your artwork, please check the sites below:
www.larsonjuhl.co.uk
www.salvadoricornici.com
www.djsimons.co.uk