Look carefully at the bottom picture. The gills ( they are gills not rigdes) are tapering right down the stem until they disapper, they aren't coming to abrupt stop in neat line. False chanterelle the gills come to stop like they do in clitocybes, milk caps. From what I remember they tend to be less bright in colour.
Considering you found ceps i presume you have trees. jack o lantens are dependant on tree roots to grow, ie they won't grow in grass. It is rarely found as far north as britian, but is found here, esspecially the warmer counties.
They glow slightly in the dark, and they are deadly poisonious. http://www.mushroomexpert.com/omphalotus_illudens.html
I can't think of anything else that is that bright and that shape. the various red coloured milk caps don't have caps that smooth.
The spiky pestle is an eater though.