tamalai,
If either the Australian or British courts find that the dismissals under their jurisdictions were unlawful (as opposed to unfair), they will be voided, meaning the company must immediatley re-instate the employee in his previous position, seniority intact, and pay him for the entire time he was out.
The fact that CX was willing to re-interview the 49ers damages any case they have that the sackings were justified.
Surley it is up to the individual to decide wether a particular offer is just.