@Charley that’s not strictly true. Previous experience can be counted as reckonable service even if there has been a break.
@Laura yes, but not in this scenario? At least not according to my maternity policy. If for example you left the NHS as a band 6 step 2, and then when you came back you applied for another band 6 post, they could count your previous experience and put you back on step 2 rather than starting at the bottom of band 6 again
If you leave the NHS and then rejoin you won't have continuous service. It will be counted from when you start back in the NHS again