Bird diversity

Having lived in the glorious Mendip Hills for the last 40 years, I am now living in a housing estate in a coastal region.  With the exception of seagulls, magpies, pigeons, starlings and sparrows, we have no other visitors. What can I do to encourage more diversity?   I should be so

grateful for any ideas.

We do have hedgehogs in abundance and I know I should be grateful for that!