Not sure I altogether understand the question - however. I was a regular who then went FTRS for 5 years before leaving the Service aged 48. I passed the 55 point last year and the following happened:
My regular pension started to be paid in full (it pretty much doubled because the commutation period ended and 11 years of RPI inflation was added).
The FTRS pension will only be payable from age 60 - and will include a pro-rata lump sum payment on that birthday. It will have been index linked over all that time since the initial quote/estimate you receive on leaving.
Hope that helps!