Are they making a bee nest?

Are they making a bee nest?

Observation - Are they making a bee nest? - UK and Ireland. Description: We have lots of bee's coming and going from our insect house. I think they are honey bee's? They are bringing lots of vivid yellow pollen (rape seed pollen)? and then sealing off the ends. Are they making a nest or a larder?

We have lots of bee's coming and going from our insect house. I think they are honey bee's? They are bringing lots of vivid yellow pollen (rape seed pollen)? and then sealing off the ends. Are they making a nest or a larder?