I was going to say the same thing as Lizdb. The modern district of Blaby is pretty large and today covers suburbs of the city of Leicester, albeit just outside the city admin. border and into the admin district of the county. In the late 1800s those suburbs would have been villages, far smaller but with numerous parish churches. You would have to purchase PR/BTs for places like Braunstone, Narborough and other substantial villages, at substantial cost, or visit the RO at Wigston, unless someone here already has them and can look them up for you.