Thank you for your question, Brendan.  I am unable to tell from the photos whether the holes are the result of a disease, or an insect, but the most likely player is this virus:   https://pnwhandbooks.org/plantdisease/host-disease/cyclamen-impatiens-necrotic-spot  
(It would have been helpful to have photos of the leaves in the early stages of the hole development, since, as you can read, the most probable disease has distinct phases.)

It is difficult to protect cyclamens from the carrier of the virus, thrips, but covering your plants in the spring may help keep the insect out.  Most gardeners treat cyclamen as an annual plant, so you can compost the ones you have, and start anew in the spring.  Be sure to stay aware of any infection next year, so you can take photos of the symptoms.   Hope this is helpful.   Good luck!

Thank you! 

Welcome!