Murray Walker has joined forces with the Castrol Rankings to bring you an exclusive vodcast ahead of every grand prix for the rest of the year. Starting this week, Murray Walker Grand Prix with Castrol Rankings brings you up to date with all the latest news from the top level of motorsport and takes a look at the movers and shakers in the Castrol Rankings.
In this week's edition, Murray kicks off with an in-depth guide to the Montreal circuit that will host the Canadian Grand Prix as it returns to the F1 calendar this weekend.