Well he has 2 choices then, point it up and hope it lasts for a few more years or pay some jobbing builder to demolish and rebuild at substantial cost, do you know any?
Why not just look in the room above and see how the floor boards/sheets are screwed down?
If the joists do not induce any loading on the wall then all the beam the has to take is the weight of 15 of those blocks plus weight of plaster (assuming its a single skin wall)
Middle route is calculate the load the beam will need to take and then calculate what the bending moment will be and select a suitable sized 2m long UB from https://www.steelforlifebluebook.co.uk/ub/ec3-ukna/buckling-resistance-s355