Holly-like leaf shrub/tree

Can someone please help me to identify this shrub/tree in my garden. It's leaves are symmetrical but the spines stiffen as they age. There are five spines on each leaf; two at the base, two half way and one at the tip.The mature leaf is about 2-3 cms from tip to base.
At present it is about six feet in height and has put on about two feet in six years (it was here when I came to the garden but had been a bit overwhelmed by hawthorn bush - now removed), though that said, it has received some manure this year as it is adjacent
to other plantings.

 

Welcome oakwoodbank.
It is a holly. Ilex sp.
Just a more unusual one from the common Ilex aquifolium.
It could be Ilex cornuta.

http://en.wikipedia.org/wiki/Ilex_cornuta

http://www.duke.edu/~cwcook/trees/ilco.html

 

Many thanks for your help.