Ordered from Screwfix on Tuesday (my nice new drill) and paid £5 for delivery before 12:00. £5 is about the cost of me driving to the nearest Screwfix Direct and back. Turned up about 09:30 via Royal Mail.
Ordered a rag bag of other stuff yesterday (grumbling that I'd forgotten to order them on Tuesday) and just had the free 'fast' delivery. I kept the order running during the day, adding bits and pieces as I remembered them, and finally submitted the order at about 17:30.
Turned up around 09:30 via Royal Mail.
So subject to further investigation I'm not sure what the £5 extra on the delivery charge actually gets me. It may be that I am well situated so that the standard delivery always gets here first thing.
Oh, and first submitted my order Wednesday morning then realised I needed more stuff (I broke a drill bit and needed a replacement) and I then realised that unlike Amazon and similar you can't add to an order or cancel an order on line. A very helpful support person managed to block the order out of the system for me and said that he thought they might be due for a software upgrade sometime soon to allow more flexibility with the ordering. Allegedly their in house system is more flexible but the web based system is older software. All rumour, but it would be a big step forward.
Cheers
Dave R