* Re #31429 Fixture, as the problem caused by two values in the

denominator being equal

* Re #31429 cpp paranoid warnings

* Re #31429 fixing typos in the code

* Re #31429 Release notes

* Re #31429 better release notes located in proper place.

* Update comments.

* Avoid repetition of warning message within loop.

* Tidy release notes.

* Add test to recreate bug.

* Add test for leading edge noisy data case

* Remove redundant if statement

* Tighten failure criteria

* Fix linux compiler warnings

* Fix release notes error

Co-authored-by: Tom Hampson <thomas.hampson@stfc.ac.uk>