A Burnet species cocoon?

A Burnet species cocoon?

Observation - A Burnet species cocoon? - UK and Ireland. Description: Located at edge of grassland field, just under the Hawthorn hedge on a grass stem. Not hidden well. Papery and thin looking with alive insect inside. Web search suggest's Burnet species but open to suggestions :)

Located at edge of grassland field, just under the Hawthorn hedge on a grass stem. Not hidden well. Papery and thin looking with alive insect inside. Web search suggest's Burnet species but open to suggestions :)