Anderson, 83, died on Wednesday after suffering from dementia. You can read the tributes to him here.
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Northern Ireland Retail Consortium chief Aodhan Connolly was speaking after it emerged footfall in the region dropped by 3.1% last month.
Derek Mackay will address the SNP conference in Aberdeen.
The grocer will simply sell the cans loose while still applying the multi-buy offer at the till, rather than replacing the plastic with card