“But not necessarily boiling hot. If you’ve got a porch or a shed or somewhere, you can hang them up and they will ripen.
“They will continue to ripen in there.
“It gets a bit messy but you can literally uproot the whole plant and hang it up and the fruit will continue to ripen. That’s one thing you can do.”
Another, less messy method may be to pick the tomatoes individually and pop them in a paper bag with a banana.
“By putting them in the bag with the banana they should ripen more quickly,” Jane explained.
source: express.co.uk