I have been sent an e-mail saying that if you put ESNE in the promotion code in the checkout then you will get at least 15% off your order. If you order an item they have on special then you will get a double discount.
http://marinestore.co.uk/
Put the code in on checkout not on the item page
(The above is copied from Practical Boat Owners forum and it does work as I have just ordered from them )
Pete