That is quite obviously an Olive but a giant at that. MrG what did she measure? I once had a specimen which measured 1.35m, loved that snake.
Without being funny, every Olive Ive ever seen had shiny scales.
As stupid as it sounds, I once had an Anerythristic L. inornatus, gun metal gray above with light grey belly, not like other "Black Housesnake I seen