Plate-sized mushrooms/fungi - any suggestions as to identification ?

Plate-sized mushrooms/fungi - any suggestions as to identification ?

Observation - Plate-sized mushrooms/fungi - any suggestions as to identification ? - UK and Ireland. Description: Numerous - all growing amonst shortish scrub grass on side of coastal hillside. Caps anything from 6 - 8 diameter & standing about 6 tall

Numerous - all growing amonst shortish scrub grass on side of coastal hillside. Caps anything from 6" - 8" diameter & standing about 6" tall