Rows A, B and C sit on the level floor of the old stalls. The rake starts at row D. That is a 1974 decision, taken so the front of the house could be cleared for a flat-floor configuration that this company has used perhaps four times since.
The consequence people expect
The one everybody predicts is that rows B and C look at the back of a head. That is true and it is why they are the cheapest seats in the stalls rather than the dearest, which is the opposite of what most theatres do with their front rows.
The consequence nobody predicts
Because all three rows are at the same height and the stage is raised, the angle you look down at the stage gets shallower as you go back — 11.0° in row A, 7.3° in row B, 5.5° in row C — and then starts climbing again from row D as the rake takes over.
So row C, the cheapest seat in the stalls, has the most level view of the thrust of any seat in the building. If what you want is to be looking across the stage rather than down at it, that is where to sit, and the seating plan on this site will tell you the same thing in numbers.