From personal experience, being on your own in a shop with a pair of shoplifters is not a nice experience. We had a panic button which went through to the Police, but on the one occasion that I had cause to use it, the thieves had left - fortunately No 2 son turned up at just the right time to balance things up, and the thieves were not allowed to leave until they had put everything on the floor (it was all tagged, and set of the security alarm).I have often wondered about tills being at the opposite end to the door. But as many people appear to have been born in a Barn or at best do not shut doors because they may be afraid to break the door we have consistently opened doors in all types of not only shops but also in my local pub which has a real problem with punters not shutting the front door when they come in. Fortunately the landlord is a big bloke and afraid of nobody to tell them to shut the door. One can imagine sat by a till next to a door in the winter being a cold occupation.
On the previous occasion, the thief was working alone, so I could supervise him emptying his bag of all the swag - repeatedly until he could pass the alarm without it sounding.
The same bloke's first visit was with a girl, and she kept No 1 son talking by the cash till at the door while he snuck in the office and nicked the laptop
The Police gave us his picture to put on the wall, after he'd been convicted of another similar offence, and they also gave us the pictures of his known associates to display.