I believe the tiles to be Minton Tiles however can not confirm as can't see the back for any marks/stamps. Sadly one of the Tiles in one of the fireplaces is cracked but remains complete- as seen in the last picture. As you can see from the pictures there aren't any grates or fire backs for the fireplaces.
The item "Fireplace Insert Original Victorian Cast Iron with Minton styleTiles" is in sale since Tuesday, May 28, 2019. This item is in the category "Antiques\Architectural Antiques\Fireplaces, Mantels & Fireplace Accessories". The seller is "clearanceroomuk" and is located in LYDBROOK. This item can be shipped to all countries in Europe.