Identify two new tree shoots
I recently saw a new shoot appear, which I knew wasn't a weed, so I hoped it was one of the flowers I planted in March finally showing up.
However, it's now big enough to see it's a tree. In fact, there are two of them just three or four inches apart. I think they're different species as the leaves look slightly different. The one on the left has elongated leaves of a darker green whilst the one on the rought has slightly rounder leaves and is a lighter green. You can see early bark forming around their bases, which are becoming relatively hard and thick.
Any ideas what they are?
I've already have two unexpected trees start growing in the last year, along with blackberries and a rose bush. I don't know where they're all coming from so suddenly, but it's ironic that little of the seeds and bulbs I'm planting are getting anywhere.