The upright cross is the Cross of St.George the patron saint of England. The white diagonal cross is the cross of St.Andrew, the patron saint of Scotland. The red diagonal cross is the cross is the cross of St.Patrick, the patron saint of Ireland. All of them are on the blue background.
God save our gracious Queen, Long live our noble Queen, God save the Queen! Send her victorious, Happy and Glorious, Long to reign over us; God save the Queen! O Lord our God arise, Scatter her enemies And make them fall; Confound their politics, Frustrate their knavish tricks, On Thee our hopes we fix, Oh, save us all! Thy choicest gifts in store On her be pleased to pour; Long may she reign; May she defend our laws, And ever give us cause To sing with heart and voice, God save the Queen! Not in this land alone, But be God's mercies known, From shore to shore! Lord make the nations see, That men should brothers be, And form one family, The wide world over From every latent foe, From the assassins blow, God save the Queen! O'er her thine arm extend, For Britain's sake defend, Our mother, prince, and friend, God save the Queen!