From the 2019 seed swap something we are yet to know exactly what it is but probably something like Gardener’s Delight.
This is a slightly unusual activity. The allotment website that we visit had a “largest truss” competition and this was the winner (in fact it had such a large truss that nobody else bothered) with 60+ fruit. The person who grew it (Urban) said it was “just a Gardener’s Delight”. The question was asked whether it was a singular freak or a genetic modification which could be inherited. Urban agreed to distribute the seed through the seed swap and we are growing it out to see that it does.
As of August 2020, it looks just like Gardener’s Delight. We’re growing both side by side in the greenhouse and the results are very much the same. The “real” Gardener’s Delight is a bit paler yellow plant than Urban’s Delight but the fruit are the same. Pity really, it would have been fun to find out what the difference was.