Just bought 50 rolls of 120 Delta 100 from HARMAN Direct (Ilford). They had a 20% discount and free delivery for the last 4 days . £3.95 a roll, delivered.
3 months ago, I asked them to list 100 sheets of 5x4 (4x25 boxes) at the volume price as it was missing from their range, whereas other 5x4 films were already at bulk prices. They obliged and I bought 100 sheets. Ilford are very considerate.