Can a job applicant be rejected for employment on the grounds that he or she is, or is not, a member of a trade union?

Under s.137(1) of the Trade Union and Labour Relations (Consolidation) Act 1992, it is unlawful for an employer to refuse employment on the grounds that the job applicant: is, or is not, a member of a trade union; is unwilling to accept a requirement to join or leave a particular trade union; or is unwilling to make payments, or suffer deductions from pay, for union dues. The Employment Relations Act 1999 (Blacklists) Regulations 2010 (SI 2010/493) make it unlawful to blacklist workers from employment as a result of their current or past trade union membership or activities.