Hello. My immediate thought is Bitter Beech Bolete (Caloboletus calopus). Found in mixed woodland – beech, oak and conifers. Acid soil. Central Brittany. Thanks for any help, contradiction or confirmation. Sorry that the images are sideways!
this time yes, but Adam has of course right that it is often indispensable to see the pore colour and the coulor change when cut in half. And one should cut a whole fruitbody in halfs and not only cut a slice from the cap ….