[quote name='Nicko' timestamp='1480932520' post='3188061']
IMO they are obliged to honour the price at which it was advertised and ordered, and if they fail to do so you could threaten them with Trading Standards, BUT if this is an honest mistake on their part (which it would appear to be) morally I don't think you can insist on them honouring it, especially as you were made aware of the error before placing the order. It depends on whether you are the type of guy that hands back the extra tenner that someone gave you in your change by mistake.
[/quote]
Sorry no, basic sog act law
Price shown, unless and until you actually hand them money AND they accept it, is an invitation to treat - see boots v royal pharmaceutical society -modern equivalent is payment by card over phone or clicking buy now and paying