I had switched to "50% less sugar & salt" [0] some months ago, and more recently discovered the "no added sugar & salt" [1] version and use this one since then. Sure it's not exactly the same taste as "regular" heinz ketchup but I'd say it's close enough.
[0]: https://www.heinz.co.uk/products/tomato_ketchup/products/hei... [1]: https://www.heinz.co.uk/products/tomato_ketchup/products/tom...