Best he reads
THIS then (about half way down).
The consequences for employees of taking industrial action
Employees who take industrial action will know that there may be damaging financial consequences for them, since they are unlikely to receive any pay if they withdraw their labour. They should also be aware that they are putting their jobs at risk.
An employer may take various measures, up to and including dismissal, against any employee who takes industrial action. An employee who is dismissed by his employer while taking industrial action may lose his right to claim unfair dismissal.
A tribunal would automatically rule that the dismissal was unfair as the action is legal. However, there is no automatic right to reinstatement and the compensation is limited.