This is Eucalyptus ‘Summer Red’ one of the best grafted Eucalyptus ficifolia, it has the largest leaf which is long and falcate to lanceolate shaped looking like a very traditional Eucalypt shape, but is also lush looking. I see beautiful examples of this tree so often through peoples fences or over the top, so I apologise for this image, if only it was OK to nosey in someones garden! But I think you can tell this is a wonderful small feature tree, it provides great screening too as it has a dense canopy so if you feel you are being looked down upon by somebody plant one.