There has not yet been any confirmation from the Wales Office over whether Mrs Gillan has officially stepped down as Welsh Secretary.
Speaking on Sky's 'Murnaghan' programme on Sunday, the former Welsh Secretary also launched a fresh attack on the HS2 project.
Visiting Wales for the first time since his promotion, David Jones MP was involved in a lively discussion with a teenager about housing.
Preseli Pembs MP Stephen Crabb is the junior minister at the Wales Office. As well as doing his new boss' old job, he'll still be a whip.