What is this tree?

Hope this is helpful

 

Looks like the cercidiphyllum japonicum to me . Thanks very much.

 

Thanks for clear close up pics.

 

In hindsight, the Cercis would have bloomed before it leafed.

 

Cercidiphyllum japonicum....love them.
They can either be female trees or male trees..
You will need to be patient to get flowers which are pretty small and insignificant.
When frosted on the spring or the autumn you get the wonderful smell like candyfloss.

Female flowers....
Cercidiphyllum japonicum flowers - Google Search:

Male flowers...

Cercidiphyllum japonicum flowers - Google Search:

 

Thanks @Silver surfer Funnily enough I can’t remember seeing any flowers on it at all! But i do recall how pretty the leaves look when they change colour. I will also be alert for the candyfloss smell

 

Your tree is still a baby...only older trees will have the flowers.
Be patient.
They flower very early in the year...March.
If I remember correctly before the leaves open.

People smell the toffee apple/candyfloss smell from a long way away and cannot work out where the smell comes from.

Look after your tree!