for luck
No ideas were introduced into England by the Commonwealth. The Commonwealth was established from the British Empire with the Queen being the head. England, being the main member state of U.K, therefore had nothing introduced into it from the Commonwealth opposed to England introducing ideas into Commonwealth member countries. So I'm not sure if this is what you meant, but I think your question should be "What two ideas did England introduce into the Commonwealth?" and in that case I would say that there are a lot of ideas that were introduced, too many to list without having more specific details on what type of ideas you want listing.
The Civil War.
V for Vendetta
the civil war
to get herppies
behind the bow
V for Vendetta Beneath this mask there is more than flesh. Beneath this mask there is an idea, Mr. Creedy, and ideas are bulletproof. - V
Delaware
Delaware
The documents which explained the ideas behind, and which urged for the ratification of, the Constitution of the United States of America are known as The Federalist Papers.
In October 2008 the Olympic website advertised the opportunity to design the mascots on for London 2012 website. After more than 100 designers, artists and agencies applied, we spent the next few months selecting the best ideas and developing them based on the public's feedback. When the final three ideas were tested with people all round the UK, they learnt that the British public didn't just want a character, they also want a story. They also tested the ideas with toy industry experts who agreed that Wenlock and Mandeville were the best choices. Based on all the feedback we received, we selected Wenlock as the official Olympic mascot and Mandeville as the official Paralympics mascot for London 2012 in December 2009. The mascots were designed by London creative agency
having faith