flooring direction

I'm about to start a project to replace flooring in dining room House is circa 90 years old. Underneath the wooden flooring is a thin underlay, underneath this are vinyl floor tiles, below the tiles is about 10mm of what looks like red clay. This is damp and below this is the concrete floor...

I am laying some engineered oak flooring, and am deciding on which direction to lay the boards. It for my master bedroom, which has a small walk-in wardrobe which I will continue the flooring into. The room is east facing. Here are a couple of photos. This photo is the view from the door...