Posted: 21/11/2015 at 08:57
The problem with a big, central, specimen shrub which (will also have width) is that it works both ways. They might not be able to see into the house, but you won't be able to see your boundary. It's also quite a small space for a big central shrub - the grass will be a big ring, and will become redundant.
I'd go for a hedge, if it was me.