Asda and Waitrose fight it out for services of autistic volunteer: 28-year-old's mother says plea to come back from upmarket store is 'bittersweet' after rival also offered him paid hours

'Sacked' Waitrose volunteer Tom Boyd, 28, is at the centre of a supermarket wrangle after he was offered paid work by rival Asda - before his old employer offered to 'welcome him back'.