Just bought (privately as seen) a 56 plate Ducato 2.8tdi motorhome. Prior to picking up, the battery was removed and recharged. Now neither electric windows, nor the central locking works. To add complication, it has a Sigma alarm. Checked fuses. Is there some sort of reset procedure to go through when the battery is replaced? It's gotta be something obvious - hasn't it??!

try checking wires around the battery area, often - with the weight of the battery - people can be a bit clumsy and knock things around,
Charlie

Yeh good one Charlie, too darknow , I'll let you know, Steve