UPDATE on the mealworm farm
Its 3 weeks since I moved the beetles into a bigger home because I was getting more beetles hatching than I anticipated.
Still getting new beetles daily from the pack of mealworms I originally bought from the pet shop. ( 15 new beetles yesterday ) but these are definitely coming to an end now - must be hundreds now!
Anyway, I have now moved the beetles which have been laying eggs to their second home to keep the eggs from being eaten and just need to wait 4-19 days for the eggs to hatch.
But...... I kept the original home separately just in case there were eggs and yesterday I saw the first baby mealworm that had hatched

it was absolutely tiny but shows that the process works.