If my benefit is reviewed would I get more or should it be incapacity benefit?

Hi everyone,

i was was a police officer and injured on duty which put paid to my career following a knee injury. I was awarded invalidity which was to remain in place for life, I have had further surgeries and now I am about to have a complete knee replaced.

my benefit was not to be removed or reduced without leave of the tribunal which awarded it. I’ve never had it reviewed however should it be would I get more or should it now be incapacity benefit ...??

thanks

mike