Only about 20 of the little blighters!!!
I noticed that the pregnant female guppy was getting a _lot_ of attention from my single male guppy and she kept hovering still and moving her fins very quickly, so I decided to get her out and into the breeding trap. Think I did it in time because within the next 30 minutes she had given birth to about 20 babies. Left her for another 40 minutes and she seemed to get a bit agitated and hadn’t given birth to anymore so assume she is done.