What if my pension age is 67 but I still want to retire and take my NHS pension at 65?

You could leave and draw your pension at 65. However, for each year prior to the scheme's pension age (in this case, 67) the pension you get will be subject to an "actuarial reduction" of 4-6%. Therefore, if the age at which you can get your full pension is 67 and you want to take it at 65, the pension you get will be reduced by up to 8-12%.