Penny Mordaunt wrote to Tim Davie urging him to bring the 'UK Theme' back
She claimed it would help BBC 'reconnect with its audience and rebuild trust'
5-minute piece of orchestral music was written by Jewish refugee Fritz Spiegl
Spiegl composed it as 'love song to those that took him in', the minister said
Mashes together songs synonymous with England, Wales, Scotland and Northern Ireland