Building the first Wembley Stadium in 1923 was the easy part. Getting the fans in for the 48th FA Cup final proved more of a challenge. — “The field had been churned up so bad by horses and the crowd that had been on the pitch well before the game” As the clock struck 3 pm on April 28th, 1923, referee DH Asson should have been poised to blow his whistle to mark kick-off for the first-ever…