Is this an olive tree?

[PeaceNotPieces]

Moved in a few months ago and were discovering loads of lovely things in the garden. But I thought olive trees grew in hot countries? And would they be edible (or is that a silly question?)

No it's not an olive tree, the leaves are all wrong. I have olive trees. Is it greengage or plum?

It looks like my friend's greengage tree.

Or a quince tree? Did it have flowers just recently? Fruits turn yellow and usually the size of a baking apple.

It did flower yes. I've never heard of these fruits though-apart from the plum.

No. Sorry, I don't recognise what it actually is but definitely not an Olive.

Definitely a member of the plum family. Greengages are like plums but yellowy green when ripe. A bit sweeter maybe. The leaves are wrong for quince or apricot and the fruit looks too big to be damsons.

Strangely, we also found a tree like this in our new front garden. It had small blossoms on it, in the spring. I thought it was an ornamental prunus. Then about 3 weeks ago I noticed the fruit. I am assuming it's a plum or greengage.
Ours does not look as if it was a nursery bought tree, as the previous owners weren't gardeners. It is quite young and random I think it might be a plum stone that grew. I'm looking forward to seeing what they are, it's full of fruit.