This feels like it would have been asked numerous times on here
before, but either it hasn't been or my Google Groups search skills
are not up to the task - apologies if it's the latter!

I've got a Standard Day Return from Crayford to London today (£9.20).
On my way home I would like to stop off in Bexley (the stop before
Crayford), leave the station to drop something off nearby, then return
to the station and finish my trip to Crayford on the next train.

Is this permitted on my ticket? Will I need to plead with the person
manning the manual gate at Bexley or will the gate just return my
ticket to me automatically for later use?

Thanks in advance for any help!

Paul