These photos are from the serialisation of Tom’s Midnight Garden by Philippa Pearce. I think this is from the three part adaptation which was transmitted in January 1974 on BBC 1.
The photographs were originally shared on the Pebble Mill Engineers Facebook group.
The following comment was left on the Pebble Mill Facebook page:
Tim Dann: ‘If memory serves me correctly…I was the Design assistant…Location was I think, ‘Abbotswood’ in the Cotswolds near Stowe on the Wold. It was used primarily for its wonderful gardens. With no interiors used. Make-Up assistant was Carol Churchill…(known at PM as Carol Ganniclifft)…& the Director was Dorothea Brooking…..Memory has now ‘crashed!’..I seem to remember there was a lot of messing about in boats!