Top half of roof light lowered into Great Room roof void

Top half of roof light being swung into position. Foreground shows temporary roof structure above Great Room

Bottom half of roof light being secured inside Great Room roof void. Original roof structure with beams and joists surrounding new roof light

Lower half of roof light being lowered into position

Delivery of both sections of roof light being unloaded from low loader with crane attachment. The delivery necessitated a road closure of John Adam Street for the day

Grignion was an eminent clock maker and an active early member of the Society.

Richard Pelter from International Fine Art Conservation Studios removing the Barry paintings entitled 'The Progress of Human Knowledge and Culture' from the wall of the Great Room. The rolled up painting shows the artist himself. Photographer Richard Olivier

Richard Pelter from International Fine Art Conservation Studios removing the Barry paintings entitled 'The Progress of Human Knowledge and Culture' from the wall of the Great Room. The rolled up painting shows the artist himself. Photographer Richard Olivier

Photographer Richard Olivier

Photographer Richard Olivier

Photographer Richard Olivier

Photographer Richard Olivier

Photographer Richard Olivier

Photographer Richard Olivier

Photographer Denzil McNeelance

Photographer Denzil McNeelance

Photographer Denzil McNeelance