Samsung Galaxy Tab 8.9 16GB/32GB £389.00/£469 @ very.co.uk (possible £342.16/£417.36 after discounts and quidco)
No, it's not an iPad. But this is the cheapest I could find this tab.
Use code ZQ195 for £25 off first order.
Quidco of 6% for first order.
Potential price of £342.16 for 16GB and £417.36 for 32GB after discounts.