Around 1,300 jobs are at risk at McColl's after Morrisons revealed proposals to shut 132 loss-making stores in the convenience chain it bought earlier this year.
The supermarket giant sealed a deal to buy its troubled rival for £190m in a rescue deal in May.
On Tuesday, Morrisons unveiled plans to overhaul the convenience retailer after competition regulators said last week that they were set to clear the takeover.
