Under this beam the  brick wall had bowed away and left  a 150mm void where the wall should have been. This bit a wall is also single skin an external so it would be cold spot encouraging condensation.  After making sure it was al stable the void is filled with the leftover insulation from the attic roof and well sealed for a good moisture barrier.

Insulation under the beam in the bathroom

The vertical timber props up the old beam on to the new floor beam and column. It’s then finished off with plywood.

Boarded under the beam with plywood.