Looks a little like a Syzygium malaccense (Mountain Apple). Google that and see if you think that's what it is.

Looks plummy. Try the Name that Plant forum, there are active UK members there. They may want a foliage photo.

Hello stanofh, Sorry for late reply...never got notice from email about follow up question. In past three years, coldest I can recall is maybe upper 30s/low 40s at nights during winter (but those are extreme cold spells that last for just few days...normally winter nights are upper 40's/low 50s). Strange thing is last year there was only one harvest of the hanging papayas in summer of around 12 fruits...it was surprise just to see fruit after nothing for 3 years. This year we were able to harvest around 20 fruits in spring and I thought that was it...butt now in fall there is another batch of 25+ fruits. Tree top is now probably reaching 12 foot tall, compared to last year when it was probably 7 or 8 foot tall. We don't use fertilizer or any plant food...the only difference in last year versus previous three years is actually less watering. Mother in law owns farm in thailand...she said to only water tree 2 or 3 times a week.

Although it looks pretty obvious that they are of the Parmentiera, I wonder if they are not a different variety, than Parmentiera Edulis/Aculeata. The Dominican fruit pictured, are a lot shorter, and grow predominately on the stems, and branches, and not on the trunk. Parmentiera Edulis/Aculeata these Parmentiera Edulis/Aculeata do have some resemblance, but the fruit I have seen down here, like those posted by pikorazi dont seem to be the same variety.