This is how Brian May played it on the rooftop of the Buckingham Palace in 2002. I'm pretty sure it is correct, as I was watching the clip when I tabbed this.

Standard Tuning
Listen to the recording to get the perfect timing

E-------------------------------------------------------------------
A---8--10--7--8--10-------------------------------------------------
D-------------------------------------------------------------------
G-------------------------------------------------------------------
B-------------------------------------------------------------------
E-------------------------------------------------------------------

E-------------------------------------------------------------------
A----12--13--12--10--8--10--8--7--8---------------------------------
D-------------------------------------------------------------------
G-------------------------------------------------------------------
B-------------------------------------------------------------------
E-------------------------------------------------------------------

E---10--8--7--8--7--5--7--8--7--5--3--7--8--10--12--8--7--5--3------
A-------------------------------------------------------------------
D-------------------------------------------------------------------
G-------------------------------------------------------------------
B-------------------------------------------------------------------
E-------------------------------------------------------------------