Widespread and common. Found in clustered groups in deciduous and coniferous woodland and along rides and tracks, the white caps greying a little with age

References: 
Breitenbach & Kranzlin (1991) Fungi of Switzerland, Volume 3, Boletes and Agarics, 1st Part
Overall (2017) Fungi: Mushroom & Toadstools of parks, gardens, heaths and woodlands