However, there is no length of service requirement in relation to 'automatically unfair grounds'.Which are pretty worthless, what ever they may be with limited service, so please enlighten me as I have experienced many situations on both sides of the fence and my knowledge of employment law is quite thorough as it has had to be over the years as an employer in today's "claim culture" & "its not (never) my fault" culture!
http://www.acas.org.uk/index.aspx?articleid=1797
Whilst there are Codes of Practice, they all pretty well fall short with minimum service and no agency will get involved with minor grievousnesses however much the individual feels it isn't minor to them!
Whilst the Code is not, in itself, legally enforceable, employment tribunals will take its provisions into account when considering relevant cases.
Employees have the right not to be unfairly dismissed. In most circumstances employees will need to qualify before they can make a complaint to an employment tribunal:
at least one year's continuous service for employees in employment before 6th April 2012
two years for employees starting employment on or after 6th April 2012.
So, with above in force, its very easy for employers to be rid of people without a threat of legal challenge.