PLUS traded Heritage ..Multi $Billion gas resource find?

That would be Valempoulières.

This summary of French basins isn't that complementary about the Jura.

"In spite of the large number of wells realized, since the discovery of the tiny and now abandoned gas fields in the Jura (Valempoulières, Lons-le-Saulnier, Vaux-en-Bugey) which were producing in Triassic, no commercial accumulation has ever been found"

It holds out some hope
"For most of the wells drilled before 1980, it is thought that their targets were badly defined because the seismic was often unable at that time to resolve the complexity of the structural traps."

Whatever, it might come up trumps. But if we're to take serious account of it in the EPG offer, we need to be told, which currently doesn't go much beyond "Seams are up to 6 metres in thickness with net coals of up to 15 metres from 950 metres in depth". Compare and contrast net coal intercept at Folchvillier.

It isn't being presented to us as conventially prospective with modern reprocessed seismic. Presence of reservoir rock is in severe doubt. It's being presented to us as CBM, just possibly tight gas outside the coal.