I've been asked to create an artwork for a memorial plaque to match some existing castings. The font looks really familiar but I'm really struggling so think it may not be just one font? Its really important to be as close as possible.

[Kieran]

[ricoCabin]

monumentletteringcenter.com has a few that are close.

[Gecko]

Trajan would get you close. There are many variant amongst those Roman style typefaces.