bugs on inside of window

bugs on inside of window

Observation - bugs on inside of window - UK and Ireland. Description: There are hundreds of these climbing up the inside of my living room window. They have been appearing in large numbers for several weeks now. I remove them but more keep coming. They are about the size of mung beans. What are they, and where are they com

There are hundreds of these climbing up the inside of my living room window. They have been appearing in large numbers for several weeks now. I remove them but more keep coming. They are about the size of mung beans. What are they, and where are they coming from?