Our old Christmas Tree

A few years ago, probably about 10, this tree was 3 feet tall and in a pot at our front door.
When it started to look a bit under the weather, probably lack of water during the summer, I took it out of the pot and planted it in the hummock near to our house (our house is to the the left out of sight).
After a couple of years we noticed it just poking up above the undergrowth and this is what it has grown to so far.
So we are accumulating a small forest at our house with the Silver Birch planted by the developers, a Beech and two Pines (I think Scots Pines) which we also planted, and this Christmas Tree pine which I don't know the correct name of.
Also got a large Buddliea which I have to cut down every year or it would just take over the whole area!