Making House Martin Nesting Cups

I had an idea to make some House Martin Nest cups. 

Last year I was asked in my local Crofton Facebook group to help with a nest which had fallen down. 

House martins use mud for their nests and they can fall down, on this occasion the Martin has made its nest on wood , I can only think that when the wood got hot and expanded the nest had dislodged, 

As the nest was too high and I didn’t have another I had to foster the chicks in other nests which is not ideal. 

I made the nests from polystyrene coated in filler, I then cut the polystyrene out and painted them brown and added some mud. 

I don’t have any plans to put these up but rather keep them in case of emergencies.