Remove gas fire, install new gas or electric fire - Gas Work job in Bromley, Kent

Job description

Current gas fire as been put at risk, needs removing.
The options I want quoting on are

remove old fire and replace with a new gas or electric fire.
remove fire and brick up fireplace

The problem I have found when using this gas fire is that all the heat goes up the chimney and does not go in to the room. So any advice on how to remedy this problem would also be great.

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Gavin was friendly & courteous, gave me several options to look at. Work completed quickly & efficiently. I would use again in the future.