Retailers in the country oppose a clause in draft pricing rules , with major grocers flagging margin pressures after reporting weaker sales. Its sales slid three per cent while the rival said sales slid 1.7 per cent .

In the Korean port city, the ruling party proposed a bill requiring beach operators to post mandatory fees to prevent summer price surges .

Meanwhile, UK competition experts see parallels between supermarket price debates and possible Burnham government policies .

The proposals come as governments worldwide seek tools to curb sudden price surges.