Saw the Asda deal got hot for £440, this is a fair bit cheaper from an e-tailer with great seller reviews on google. Free shipping, ships within 24 hours
They guarantee no extra tax or customs to pay, advise delivery will be 22nd to 24th August. Reviews on google say really good things about fast delivery.
Thought it was worth sharing
Link to google seller reviews (Seller rating: 4.8 / 5 - Based on 2,418 reviews)