You can fit a modern gas fire unit into an original period fireplace, like this Keaton Art Deco marble surround one.

Antique 1930s Art Deco Fireplace. @Deidré Wallace

I'd love to sit in front of this with a good fire quietly crackling away in a wrap around leather chair, a good book, cup of tea and lots and lots of time.

Art Deco

Intriguing fireplace that combines art nouveau stylistic elements and natural lines with the top of raw metal medium that would later become one of the driving themes of art deco design.

Art Deco Fireplace

Craddock Fireplace Insert from Twentieth Century Fireplaces. Big collection of Fireplace Accessories from United Kingdom. Also deals in Manufacturer of Craddock Fireplace Insert

cast iron tiled hearth - Google Search

Dining room hearth could be re tiled in black and white as cohesive link to entrance hall. Or use white only off cuts from entrance hall cut to size if pattern too fussy.