The iPad Air is going on sale today (8AM) and Pcworld and Currys have a 5% discount code.
The code is: iTAB5
So for the basic 16GB instead of paying £399, it would be £379.05 with the £30 Pcworld and Currys voucher. The final price would be £349.05. 1% cashback on top.
I can confirm this discount code works, it saved me £28.95 off a iPad 32GB 3G+ wifi model.
32GB- £425.05 (With £30 Voucher)
64GB- £481.05 (With £50 Voucher) (Corrected price pointed out by APPLE-SAM)
128GB- £557.05 (With £50 Voucher)
16GB- £444.05 (With £30 Voucher)
32GB- £500.05 (With £50 Voucher)
64GB- £576.05 (With £50 Voucher)
128GB- £652.05 (With £50 Voucher)
Voucher details: http://www.currys.co.uk/gbuk/world-of-tablets-576-commercial.html?intcmp=home-banner--tablethub-cp576-marketing-311013