Especially in smaller shops, the queueing system may also change depending how busy it is - so if it's quite quiet, you'll go to a free till, if there's a few people and, say, two tills, you'll have two short queues - and then when it gets busy, you'll have one long queue, and people will go from the front of it to the first available queue, It can swap between these in about 30 seconds, and it just happens, because suddenly there are more people, and this is the most space-efficient, quickest way of doing things.
I quite like it, and I'm never quite sure why people don't do this outside of Britain...
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Especially in smaller shops, the queueing system may also change depending how busy it is - so if it's quite quiet, you'll go to a free till, if there's a few people and, say, two tills, you'll have two short queues - and then when it gets busy, you'll have one long queue, and people will go from the front of it to the first available queue, It can swap between these in about 30 seconds, and it just happens, because suddenly there are more people, and this is the most space-efficient, quickest way of doing things.
I quite like it, and I'm never quite sure why people don't do this outside of Britain...