If the two halves will knit together, it may be possible to glue them together and then whip over the top of them to create a firm join. I repaired a neighbour's shovel that way. It just depends how precious the old one is?
I did end up ordering a cheapish S&J border fork, but i will give repairing it a go! It's not precious at all, but my garden robins seem to particularly like resting on its handle while looking over freshly-turned soil, so I'd like to save it for their sake.
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I would definitely advise trying in person at a garden centre/DIY place if you can.
https://forum.gardenersworld.com/discussion/1061308/best-fork-spade-to-gift-a-gardener
Edited to add, if you have a Men's shed or similar near you, they might be able to repair it, depending on the damage.
https://menssheds.org.uk/about/what-is-a-mens-shed/