The answer is that it could violate Article 8 of the ECHR Right to Privacy.
In a recent Spanish case in the European Court of Human Rights which considered the use of covert cameras recording staff for evidence of suspected thefts. Staff were told about some cameras but there were additional ones that were placed covertly. As a result several employees were dismissed based on evidence obtained from the covert cameras.
A Spanish court found the cameras were justified, appropriate, necessary and proportionate, however, the ECHR disagreed on appeal and said this was a breach of privacy. Surveillance is an intrusion into private life and a fair balance of the right to privacy against the employers rights had not been met.
If you do have covert surveillance in your workplace then we would advise our clients to contact us for specific advice on the uses of that as in some circumstances use of this may be acceptable.

Impression works with businesses across the automotive aftermarket supply chain such as parts suppliers, warehouse distributors, motor factors and independent garages. Covering all aspects of automotive aftermarket marketing, including social media, event management, customer newsletters and PR, Impression is able to quickly establish itself within a client’s business and work towards their objectives.
