If you frequent the Purse Forum regularly, the ad is larger than life... so you won't miss it next time it comes around. This has been my personal experience anyway. I'm not sure how often they have it yearly. A few maybe?? HTH.
Looks like you should be able to get free shipping through Saks because the order is more than 100 GBP. They have a good selection of AWs. Just be sure to sign up for their email list and you can get 10% off.
You should also check out Azalea. They don't always have the biggest stock, but you can get 25% off your order with the code "GRETCHEN25". Only downside is that I don't think they do free international shipping.