Fixed the link for you:
BA seeks to close main pension scheme - BBC News
The short answer to your question is "some are".
There are quite a few who joined a while back who are in NAPs, are still contributing and expecting to draw benefits from the scheme. However NAPS hasn't been available to new joiners for quite a few years.....they are on BARP or some iteration thereof.
The repercussions of this could be interesting to say the least. Could be a defining moment for BALPA at BA.