This sounds like a raw deal, but if the company went bankrupt, it's very unlikely that they would get anything. 1% is better than nothing!
It's a bad deal for staff, as if the company were to cease trading, any redundancy payments that could not be met by the company could be claimed from the National Insurance fund.
Did VM used to own these channels in the past and sell them off, or am I thinking of another shopping channel
I seem to remember VM decrypting and making the channels totally Free to Air in order to widen their reach.