The retailer rebranded its version of the confectionery as Mini Gems, following a campaign by a disability academic.
Dr Erin Pritchard, a lecturer in disability studies at Liverpool Hope University, had previously approached supermarkets and confectionery makers about changing the name of the sweet.
An M&S spokeswoman said: “We are committed to being an inclusive retailer.”
See how shoppers in South Tyneside reacted to news of the rebrand.