Nest made in tall grass?

Nest made in tall grass?

Observation - Nest made in tall grass? - UK and Ireland. Description: Terrible photo but couldn't get closer due to barbed wire. 'Something' had joined a number of tall grasses together and formed what looked like a nest. I could see an 'entrance' but it was stongly built and didn't come apart when I pulled it closer to pho

Terrible photo but couldn't get closer due to barbed wire. 'Something' had joined a number of tall grasses together and formed what looked like a nest. I could see an 'entrance' but it was stongly built and didn't come apart when I pulled it closer to photograph.It was about 3.0 - 3.5 cm long. Not large enough for a rodent. Help please?