I have turned it down... Logic as follows:
1. Minimal addition to pension. It freezes for me at age 58 (40 yrs AFPS 05).
2. Limited number of attractive jobs left... Esp as I will effectively be working for half pay.
3. I have to leave eventually, why not make a start at the rest of my life?
4. 37 years is enough in anyone's money!
5. No guarantee after SDSR15 that there will be jobs for old farts to 60 anyway.
With less than two years to go it is a bit scary but I am already getting enough of a picture of what lies beyond to look forward to it.