Prince Charles and the Duchess of Cornwall met worshippers at a special visit to Dawoodi Bohra Mosque, in Northolt.
His Royal Highness and the Duchess of Cornwall ascended the red carpet-lined steps to the release of white doves and coloured balloons.
Their arrival was marked rousing drums and trumpets from the 21st Jamali Scouts who are based at the Dawoodi Bohra Mosque, in Rowdell Road Northolt.
The royal couple were shown exhibitions on the strong links between the Dawoodi Bohra Muslim community and the Royal Family dating back to Queen Victoria, as well as traditional food and art.
They sat in on a class of nine and ten-year-olds learning about caring for the environment and integrating within society, and met Prince Ezzuddin, the son of His Highness Syedna Mohammed Burhanuddin, the spiritual leader of Dawoodi Bohra Muslims worldwide.
And the nature-loving prince was particularly pleased to see the progress of a unity tree he planted on his earlier visit while the mosque was still under construction.
In a speech to an excited crowd on Wednesday he said: "When I was here 13 years ago I hoped for an opportunity to visit again and see it. I must apologise for taking 13 years, I shall try to do better next time, but I'm delighted my wish has come true.
"I can't tell you what a joy it is for my wife and myself to join you this morning and to be welcomed so warmly to this very special mosque."
To see a gallery of pictures from the visit click here .