Hello, this appears to be the ScotchKut (SKS) Modified Roman. It is possible it is a digital version, but does at least closely follow the original plastic letters. It contains the long thin serifs on the crossbar of the ‘T’, along with the notable feature of the bottom of the ‘W’ being very narrow compared to the top. The version of Modified Roman used for the epitaph at the bottom of the memorial also appears to be an SKS alphabet; the Raised Modified Roman. The MLC has digital versions of both of these alphabets:
MLC Modified Roman SKS
MLC Raised Modified Roman SKS