Spectacular and deadly?

Spectacular and deadly?

Observation - Spectacular and deadly?. Description: Largest specimens had caps some 25cm or so wide and shield-shaped/irregular. young fresh specimens had very firm, off-white caps. a distinctive red, bulbous base to the short stem. tubes yellow but staining blue green on bruising. flesh bruises light bl

Largest specimens had caps some 25cm or so wide and shield-shaped/irregular. young fresh specimens had very firm, off-white caps.
a distinctive red, bulbous base to the short stem.
tubes yellow but staining blue green on bruising. flesh bruises light blue. Later fading to brown.
pores orange-red in maturity.
unpleasant smell and was attractive to flies.
calcareous soil, ancient grassland with a few scattered trees. growing under OAK. There were 2 groups of mushrooms about 50 m apart.

Edit: Post photography, all specimens were left on site exactly where they were found to allow continued spore dispersal.