As has previously been stated a company can terminate you contract of employment at any time it wishes.
Whether or not the termination was 'legal' or a requirement to keep the company solvent under the auspices of SOSR is irrelevant.
The relevancy would be discussed at the subsequent unfair dismissal hearing that could be anything up to 2 years after the dismissal. A quick Google search will reveal that no employee at tribunal for unfair dismissal has won the case where the company stated SOSR as the reason behind the termination.
So, Flying Chick, you're strike 'may' be legal, even that is yet to be proven, but can you afford to wait out the industrial tribunal?
Will the strike be legal? Are the company fundamentally changing your contractual terms? Or are you striking over the possibility of loss of future earnings?
If it's the latter then you had better stand by for a P45 through the door because, as BALPA discovered, a strike of unfounded, potential future losses is NOT legal.
Good luck, keep taking the happy pills.