Not sure what else I can add to my original post!
Except that, at the time of writing on Saturday evening, the £20 off code (ACHICA20AMEX) is working again. For orders under £20, you don’t pay a penny.
The Taittinger champagne, below, seems to have sold out though!
Until midnight on Sunday 29th, they are even offering free delivery on orders over £10.
Remember that this voucher is only meant to be used by American Express Platinum cardholders only.