By Jon Robinson Google has been accused of using “anti-competitive practices” which harm thousands of publishers and advertisers in the UK. The Competition and Markets Authority (CMA) said it has provisionally found that the US giant could be negatively impacting rivals over open-display advert technology. According to its findings, the watchdog said that when placing digital adverts on websites, the vast majority of publishers and advertisers use Google’s ad tech services in order to bid for and sell advertising space. The CMA said it is concerned that Google is “actively using its dominance …