It's just a titchy one out of a garden centre, I didn't realise they could
grow
that high though. Still there should be enough room out the back for it.
Thanks.

I am assuming we are talking about the species rather than a dwarf cultivar?
Nevertheless garden centres are notorious for selling plants that soon
outgrow their welcome. I had a pinus wallchiana (BP) growing in a large pot
in an attempt to limit the size. Sadly it was stolen when it had reached
over a metre in 18 months.