Well, my plot thickens! Saw A Yodel van just outside, was waiting for a knock on the door. Nothing.
I then went out to the van, saw the driver standing outside number 5, (we are number 6) Said "can I help you?" He said that he was trying to speak to number 5 re. a parcel that he left there. Turns out it was the one that should have come to me, but showed on the parcel tracking thing as being delivered to someone called Simmons in Newton Abbott! Very apologetic van driver, I bet his boss gave him mega grief! I expect that there was a lot of competition to get the contract for Amazon deliveries, and Yodel are "not at home to MR Cock-Up" !