Sh1tty Door Locks

Hi guys

When i bought my 90 in February this year the driver's door lock barrel kept coming out of the handle so i replaced both front door handles and locks, so 6 months on after replacing the handles and locks the door lock barrel is doing the same so just wondered if there are any better door handle / locks out there

Its ok I mite have solved my problem as I think the screw in the back of the barrel has unscrewed its self, it suddenly dawned on me as I was reading another thread on the same subject