My house is a 2 up 2 down Victorian terrace with rear 2 story extension for kitchen / breakfast room and bathroom above.
You walk in to the lounge from front door (no porch) and the next wall/break in room is the rear door to the kitchen extension.
All the other houses in my street are the same layout but have a wall dividing the lounger / dining room.
Ours has been removed approx 40 years ago.
Nothing has been bought up on survey, but it strikes me as odd that a long room (approx 4.5m wide by 10m long) has no beam where the wall was removed.
Looking on neighbouring floor plans the wall may have not been structural as the walls above do not sit directly on top.
The timber floor joists go across the room rather than the length of the room.
It's been done so long ago and there is no sign of movement so I assume it's ok.
Would you be worried?