If you live in one of 500 locations earmarked for a full-fibre upgrade from BT-owned Openreach — your broadband connection speed will be supercharged. In total, some 2.7 million homes and businesses will benefit from the latest nationwide upgrade plans. Openreach maintains the largest broadband network in the UK, with 99% of homes and businesses able to connect to its internet infrastructure. In comparison, Virgin Media O2 is the second-biggest network with under 60% of all premises able to connect to its cables — although every connection can reach gigabit speeds. View Deal | Get 100Mbps down…