Paris, April 22 -- Formula One chiefs unanimously agreed on Monday to make rule changes following severe criticism of new regulations introduced this season which led to doubts over Max Verstappen continuing in the sport. The new rules made cars a combination of combustion and electrical power, meaning drivers had to carefully manage their battery, effectively slowing down on a qualifying lap, while the cars had boost buttons to allow them to overtake. Four-time world champion Verstappen called the new style of racing "a joke" after the Chinese Grand Prix and hinted he would take a break from F1 in 2027 unless changes were made. Other drivers had criticised the new rules and fans said the changes had detracted from the experience of spectat...