These are the climate classes, Seeing as most people would keep their houses cooler than 32 degrees it shouldn't be an issue ...but it can be if you're planning to put it outside or anywhere that does warm up and you would want to make sure it is rated ST or T in these situations (most decent quality fridge freezers sold are rated SN-T giving them the full range from 10 to 43 C)

Climate class SN: this appliance is intended to be used at an ambient temperature between +10 °C and +32 °C; Climate class N: this appliance is intended to be
used at an ambient temperature between +16 °C and +32 °C; Climate class ST: this appliance is intended to be used at an ambient temperature between +16 °C
and +38 °C; Climate class T: this appliance is intended to be used at an ambient temperature between +16 °C and +43 °C.

Thanks Ellis, saved me posting the info. It isn't to do with energy ratings.

Having been given the money by a relative, I then had to find something suitable in Britain for use here. There wasn't a great choice unless you wanted to hammer a normal North European model here in the summer heat.

I checked my Fridge/freezer and it is SN to T which covers all the options. I checked a few of the UK suppliers and they all seem to offer energy ratings that cover both extremes.