Depends what your ground is like for keel slugs.
Personally I just leave my 2nd earlies in the ground and pick them as I need them, which in my case will be a while yet as I have only just started lifting my earlies.
If at the back end of the season I haven't picked all my 2nd earlies I lift and store them with my maincrop varieties.
The timing of this is dictated by the weather at the time i.e. before the onset of frosts.
Once in store I eat the remainder of my 2nd earlies first.