If you want to see Mercury transiting the Sun today (happening now, and for about the next four hours until ~6pm UK time) there are several places online where you can watch including this livestream from Greenwich’s Royal Observatory https://www.youtube.com/watch?v=iOhDfylYvUQ&app=desktop and NASA are posting near-live stills here http://www.nasa.gov/topics/solarsystem/features/eclipse/index.html
More info here too http://www.bbc.co.uk/news/science-environment-36228327 and it’s #MercuryTransit on Twitter
Courtesy of Jo Brodie from psci-com list
ADDITIONAL: Even though the live feed has finished, there is a link on the page to watch the nearly FIVE HOURS of transit here: https://www.youtube.com/watch?v=Z6jedO3CJ8w
#BrumSciComm 