United Kingdom 
Can anyone tell me what this tree is? It's about three years old and about 4ft tall now.
Thanks.
Shaun.
30 May, 2017
Answers
I agree silver birch.
30 May, 2017
Agree.
30 May, 2017
Yup. Looks like Betula pendula. :)
30 May, 2017
Agree
30 May, 2017
You might consider relocating it to give it more room.
31 May, 2017
Good thinking - there's not going to be room for it so near the fence. Also you need to avoid the branches overhanging next door so take the width of the mature tree into account when you move it.
31 May, 2017
Previous question
Could be a birch? Need a better picture of the leaves.
30 May, 2017