Bongo Fury

Central key locking has packed up on all doors. Very slight clicking noise coming from drivers door. Anyone have any ideas

If the drivers door lock itself is working direct with the key, but not operating the other doors, then the most common cause is the drivers door loom, followed by the locking module itself. Try operating the key whilst slowly opening/closing the drivers door, if it suddenly works then the loom is at fault, down by the lower door hinge. They can be repaired, but be aware that once one wire starts breaking then others will follow soon after, either replace all the wires with new lengths or replace the whole loom (available in shop).
Otherwise it needs a meter and testing to identify where the fault is.

The clicking suggests the electrics are working fine.

Its normally the servo inside the drivers door which packs up. Its just a solenoid and after time they simply loose their effectiveness. About 3 or 4 pounds on ebay.