I just used the £10 off a £30 spend and did a separate order for 15% off on the other thing I was wanting - all with free postage. Bargain! I knew there'd be a silver lining to this recession business!
a991 just worked for me! And I'm so grateful to Mumsnet as it was only giving me the 10% offer as soon as I'd called up my address details , after finding code in here I manually entered it and got my 10 quid off - hoooraayy!