I do hear that they are going to have a retirement bulge at some point in the near future (and that's from a contact I know who works there).
The problem with so called "retirement bulges" is that they almost never happen. If you take a group of pilots of any age, what tends to happen is that the group is subject to attrition significantly before it reaches compulsory retirement age. Medical failures, early retirement, part time working etc. All of these factors and more besides erode the numbers involved before they reach 65, just as they used to at 60, and 55 before that.