Don's representatives just posted this date on his facebook page.
Here's an article about the concert. Tickets are not on sale yet.
I'm guessing this will probably be Don's first time playing Hyde Park. I don't think I've heard the guys play here before.
http://www.independent.co.uk/arts-en...-a6917121.html
Also check back at this page to buy tickets when it goes on sale soon.
http://www.bst-hydepark.com/
ETA: Tickets go on sale this Friday.