This instance is the Clarborough footwall, BPRG-85-02 in Gainsborough Basin, the seismic imaging here becomes explicable with footwall collapse modelling. Given this geologically plausible model we can bid for blocks like this one for seismic detail obligation, and confirm structural closures in the Tournaisian. They will have natural fracture systems which are likely to be well developed and re-opened in Oligocene-Recent Alpine uplift events. One discovery would validate many similar plays.