There is an abundance of over punctuation on that sign. It looks horrible.
It was probably written by the same illiterate who is writing the notices that are posted at closed booking offices, viz.
http://www.firstgreatwestern.info/coffeeshop/index.php?topic=5504.msg75575#msg75575FGW▸ must have lots of staff in Swindon who can spell and use grammar correctly. So why is it that these notices are apparently composed by some clown who failed GCSE English, and not proof-read by anybody at any stand in the process between being typed and screwed to the wall?