Side shoots on greenhouse cucumbers. Help!!

I'm growing crystal lemon cukes in a greenhouse and they are doing great. Noticed this morning that they are throwing out side shoots from the bottom two or three nodes and wonded what to do next. Do I 'stop' them after so many leaves or leave them to ramble?? I don't think I remove them completely.

Mine were getting too big so I pruned the growth shoots near the bottom as I could barely get into the greenhouse without damaging them anyway.  It doesn't seem to have done them any harm. 

Or after first pair of leaves if you have enough fruit