@Aitor 1
As a result of tax changes Gordon Brown blundering about trying to find some more 'stealth' taxes. FIFY
BT pensioners may like to reflect on the fate of Equitable* customers, who also went to law to try to force their pension provider to pay them what they thought they were entitled to. They (and other Equitable customers) are now getting far less than they would have done had they accepted the deal they were offered.
* I'm not claiming the circumstances are identical or that neither business had done anything wrong. Just that 90% of the time, when you go to law, the only ones who benefit financially are the lawyers.