@Mantis64
This is only from the short stint in India- but there are popular fruits (that farmer complained ringencks would ruin in a day!). But what you can get in UK readily:
Oranges
Bannana
Guava
Mango
Berries of all sorts!
In the wild- these are 'western' relatives of these things that are extremely popular. In the middle east, the wild ringneck populations destroy dates and figs- it was a hoot to watch a flock of 20 land, destroy the cluster, and then take off. ha.
Do check the frozen section of your market: contrary to popular belief, frozen fruit maintains its nutritional value (macro and micro). You will find bags of precut fruit (just defrost before serving).
Ask away- that's what this site is for