Every employer will recognise that sometimes an employee is just not working out. Often it can be difficult to put your finger on precisely what the problem is and it doesn’t fall squarely under the headings of “conduct”, “performance” or “redundancy”.
A classic example of this is where there is simply a personality clash with an employee. They could be excellent at their job, but are not able to get on with their manager.
It can be possible, in very select circumstances, to dismiss an employee under the heading “some other substantial reason”. Tribunals are loathe to allow this practice to become too widespread, so if you think you have an employee to whom this may apply, please make sure you take advice.