Hi all who have problems with their Mini One central locking. I too have the same problem which i'm getting fixed. The solinoides in the door need replacing, i'm afraid it can be a couple of hundred pounds and that's without labour and VAT costs.This according to research and my mechanic from BMW Mini, is a design fault of the Mini One from 02-06, later versions seem to be fine.
I love my Mini but will be trading him in for a Honda Civic. Shame!
Hope i've been able to help
Samantha, March 2011