There are three points that are crucial to reducing your accent if you want to be presenting in English and the first one kind of blows people out of the water.
So London in particular, as you get to the center, it becomes a complete gridlock where you breathe diesel fuel all the time, and when you get home, you will blow black dust out of your nose.
I mentioned the interesting facts, referred to the excellent slides, and then finished up by saying “we'd all like to thank Miss Bligh for blowing out her slides.”