I have done the A-B+C and in reverse many times.There was no possible way to go from C to B or A yesterday afternoon without the bus.

Every single pax exit to B was closed off :-(

The minibus that I was in had a lot of EK veterans . We were all packed like sardines ( no space for luggage).

PS: Did the walk from B to C on the 16th and did notice the construction bit.