Users are experiencing difficulties accessing the National Lottery website and app due to a planned closure for significant upgrades, not an outage. As of 11 PM on Saturday, all draw game sales and prize claims in shops across the UK have been paused and are expected to resume late Monday morning. This closure is part of the largest technological upgrade in the National Lottery's 31-year history, anticipated to last approximately 36 hours. Customers will be unable to log into their online accounts, purchase draw tickets, or claim prizes until later today, Monday, August 4. Allwyn is upgrading the National Lottery’s gaming and retail systems to modernize the infrastructure, as the current systems have been in place since 2009. Some in-store terminals may experience delays in coming back online due to the upgrade processes.