Two-hour delivery is free if you have Prime. One hour is about £5.
On the normal Amazon.co.uk Prime, they dispatch same-day and always deliver next day, usually by ~1pm.
It does illustrate why in my experience non-Prime customers are drifting away from Amazon, though. They're sharpening their localised and top-tier delivery experience whilst seemingly letting 'ordinary' orders languish. Whereas I can go to another retailer, or straight to the manufacturer, and have my order on my carpet before Amazon even put it in a delivery lorry.
https://services.amazon.co.uk/services/fulfilment-by-amazon/...