I said they shouldn't be allowed, I also used the term organisation deliberately to indicate that it was general (as opposed to specifically just aimed at business) - which included unions within it, it was also under the impression they are not allowed to.
The latter half of the was speaking about the building industry (who are a business selling a service/product) - which is why it was referencing them.
Do you have any examples of public sector organisations which ban based on political ideology, or any trade unions which do this? (I'd be interested to read up further on the subject).
As (Blacklisting was made illegal under the Employment Act 2010.), which makes me somewhat surprised to hear the public sector are doing this via the proxy of political affiliation.
The police, prison service both ban members of the bnp, as does Aslef, and all the bans have been upheld by the courts.
http://en.m.wikipedia.org/wiki/ASLEF_v._United_Kingdom
http://hudoc.echr.coe.int/sites/eng/pages/search.aspx?i=001-114240#{"itemid":["001-114240"]}
Are two links, the first relating to aslef, the second to a private bus company where discrimination was deemed ok.
https://www.google.co.uk/url?sa=t&s...=NrjCApkMfazLRQm8Cvk5eA&bvm=bv.53899372,d.d2k
And that one is the police force document confirming the ban.