Two Surprise Crops - quite unexpected

I have a large crop of mandarins  and olives growing in my front yard. When I moved here nearly a year ago I thought how lucky I was to have so many olive and citrus trees. I had no idea that I would have further luck and they would be fruit bearing. Often these trees are ornamental or due to our climate don't bear fruit each year - so they are a bit of a lucky dip. There are 2 mandarin trees, one is laden and one is stunted in growth and looks sad. I have loads of olive trees flanking my two side fences and there are green and black olives scattered her and there. It will be interesting to see if the mandarins are of eating quality otherwise marmalade may be on the cards. I think the olives will remain as decorative items as I have no idea what to do with them.