England players were booed by Hungary fans when taking the knee as a sign against racism before their Nations League opener in Budapest on Saturday. Despite a spectator ban imposed by European ruling body UEFA due to the behaviour of Hungary fans during the Euro 2020, some 30,000 people – mostly children – attended the game at the Puskas Arena. UEFA rules state children under the age of 14, along with one adult for every 10 young fans, can attend matches behind closed doors. According to media reports, the anthems of both countries were respected, but boos were audible when England took a knee…