I need good traffic from UK,where to find ?

I made some site and need traffic only from UK, i have some solution to get from facebook UK traffic, but not sure is it good for my domain and SEO?
I use wordpress and i will install plugin to block all country except UK , is it good for SEO and my domain? I need to good rank only for UK.
Any proposal for getting free traffic from UK ?
Thanks

You can approach people selling geo-targeted traffic here in the services for sale section.