I tried the bodad approach - "You can try bending it by using a pipe of suitable diameter and length and brute force" - using an old metal tent pole I had lying around, and treading on the fork.

It worked brilliantly first time and reduced the bend. So I had another go to reduce it a bit more, and the tine broke off.

So now I have a three tine fork. And a potential tent peg.

"Such is life", to quote Ned Kelly. Or to quote Sandy Denny "Who Knows Where The Tine Goes?"

Some great ideas in here anyway. You can rely on the Mudcat to come up with the goods.