A TRIO of steel erectors has been sacked from Heathrow's T5 site after failing to clip on their safety harnesses.
The Watson Steel workers were caught on camera and suspended pending a BAA disciplinary hearing, which resulted in their dismissal last week.
Union sources are believed to be considering challenging the decision because they believe the workers' human rights were breached.
One official said: 'What they did by not clipping on is indefensible in terms of safety but we are looking at the human rights implications.
'The lads could have a case because they were being videoed without their knowledge.
'There might also be issues under the Data Protection Act.We don't know what happens to these videos and there is a wider issue over data at T5 because of all the information stored following security and site access checks.'
A BAA spokeswoman said: 'A disciplinary procedure is on-going involving a serious breach of T5 safety policy by three steel workers and it would be inappropriate to comment until this process has concluded.We take safety and security extremely seriously and comply fully with data protection legislation.'