Baz wrote:
Friday night on "Gardeners World" Monty Don suggested that removing
all the leaves this late in the season would get the plant to put
all it's energy into ripening the fruit,

Monty Don knows eff all about gardening, but in this case his
researchers gave him the correct information.

If you remove all of the leaves, where does it get its energy from?

The roots and old helios (the sun)

But surely the conversion from sunlight to energy happens on the leaves,
which are now in the compost?