Forgive me for being sketchy -
Wilko have had garden forks and spades on sale recently for £2.50. I'm on an allotment Facebook group and there have been reports from across the country of them being sold from 1p - 25p. The store I checked this morning in Bristol had them and they scanned at 1p but they clocked it and manually adjusted the price to £2.50.
The link above is for the gardening section but these tools are not listed on the page. They are wooden handled ones that have a 5 year guarantee sticker on the front and a label showing "Wilko stainless steel digging spade" on it. Barcode for the spade ends in 0460. I don't have any pics so please don't ask me for them!
There were also reports of gardening shears scanning at 1p but I don't have any details of those.
These are all the details I have. What you do with that info is up to you! Maybe worth a look if you're passing
When I was in there, there was a sheet at the till which had details of 99% off some other gardening stuff and there was a 1p column but I couldn't make out what it said.