Have a look here, New Judge
http://www.teacherspe...rs_faqs.htm#anchor11.
Relevant sections in the current scheme rules say:
Q. What can I earn without my pension being affected?
A. Your earnings plus your annual pension must not exceed your best salary in the average salary period used in the calculation of your benefits. This amount is subject to review each year, there is a re-employment ready reckoner calculator on our web site.
Q. Can I return to teaching employment after retirement?
A. Yes, but you need to be aware that your earnings may affect the amount of pension paid to you. You must inform us in writing immediately you take up a teaching post.
You can complete a Certificate of Re-employment using My Pension Online, our secure site.
Seems complicated and maybe i need to read the full set of rules, but fortunately I'm not planning on drawing it yet.