Why distance alone is not enough to estimate a move realistically.
More volume usually means more loading, carrying and transport effort. Large, heavy or disassembly-intensive furniture can add time.
A short route from vehicle to flat differs from a long route over several flights of stairs. Lift size and availability also matter.
Packing, disassembly/assembly, additional protection or special access and parking conditions can change the effort. A meaningful quote therefore needs more than two postcodes.