Large fungus 1

Large fungus 1

Observation - Large fungus 1 - UK and Ireland. Description: Fungus grown in grass where field blewits have been seen in earlier years. Creamy white spore print and cap is 165mm in diameter. It seems too large to be a field blewit and the stem is pale brown with no trace of violet. What is it?

Fungus grown in grass where field blewits have been seen in earlier years. Creamy white spore print and cap is 165mm in diameter. It seems too large to be a field blewit and the stem is pale brown with no trace of violet. What is it?