The main phrase I've heard in my about 15 years of working in the shop has been:
"Free Education, me arse!"
followed by
"That time of year again!"
and, customer having looked up at our shop sign
"Is this [our competitor with completely different name]?"
"Free Education, me arse!"
followed by
"That time of year again!"
and, customer having looked up at our shop sign
"Is this [our competitor with completely different name]?"