Outhouse, why don't you have a chat with the employee trustee, there must be one and if you ring H/R they can probably give you a name.
It was my understanding that the fund has been in deficit for a while and the company have a programme in place to make up that shortfall. As someone who is obviously already lucky enough to have retired you are probably in the safest position along with thse of us with frozen assets. The guys still working are the ones who would need to worry most IMHO.
However it's nice to see that the company will accelerate the deficit programme (that is if I read the letter right).