it is hard to tell from the pics but it almost looks like the fire surround is sticking out from the wall a bit and could do with either a bit trimming off of the back or off the wall, is there a gap at the top as well or is it flush to the wall, a photo of the whole thing may be a bit more informative, and lastly if it is fitted right and you still have that void all around it you can buy fireproof expanding foam, fill the gap and stick a bit of stainless angle over it to make it look nice, quick cheap and easyHi GM right i ripped out an old style council fireplace and it had a load of light