I have now received a reply from my local MP who contacted the dept of work nd pensions - Steve Webb. the letter is a standard letter on the Tupe subject and it confirms tat in 2004 the government gave the right to employers to transfer people with same conditions but with different types of pension which were less favourable to the employees.
This gave employers carte blanche to do what they liked regarding the pension funds.
I have also received a letter from the pension Advisory Bureau which says that in the statute of the Pension Trustees, there is an article saying that they allow to an employee to have the pension but very much reduced. In few word the government and the law system allow employers to rob you of your pension and you have no way of appealing against this situation.