Nope - that just highlights a company that does it.
If an employee refuses, what are the legal ramifications?
This is relating to drugs, but as alcohol is a drug, it is applicable:
The law
The legal position on drug testing at work is confused. There is no direct legislation and important legal questions hinge on interpretation of a range of provisions in health and safety, employment, human rights and data protection law. The main principles behind the current legal and self-regulatory provisions appear to be as follows:
that people are entitled to a private life;
that employers are required to look to the safety of the public;
that people are entitled to dignity;
that people are entitled to proper quality standards for evidence used against them in court or disciplinary
proceedings.
http://www.jrf.org.uk/knowledge/findings/found ations/694.asp
And it looks as if employee consent is needed:
"Drug testing and your rights
Your employer may decide to test for drugs in employees. To do this, however, they need employee consent. This should normally be given where your employer has grounds for testing you under a full contractual occupational health and safety policy. "
http://www.direct.gov.uk/en/Employment/HealthA ndSafetyAtWork/DG_10026594
But further:
You can't be made to take a drugs test, but if you refuse when your employer has good grounds for testing you under a proper occupational health and safety policy you may face disciplinary action, including being sacked.
Note the 'good grounds' - good grounds can't be random, surely?