Instructions:Just got this through on email .. worked fine for me :)
eCoupon XXCGRP is valid on a single order over £130 at www.tesco.com/groceries, delivered on or before 23.59 on 6th June 2010. It can only be used once per transaction & once per customer. The minimum spend excludes purchases of infant milk formulae, gift cards and the tesco.com delivery charge. Purchases from Wine by the Case, do not qualify. Cannot be used in conjunction with any other eCoupon beginning "XX". Offer applies only to recipients of this email only. Additional Clubcard points will go onto your Clubcard account within 4 weeks.