Grand National 2015 tips: How to pick a winner

The world's most famous steeplechase takes place at Aintree this Saturday.

The Grand National sees 40 horses attempt to negotiate their way past 30 jumps in Britain's most betted-on horse race.

Shutthefrontdoor - the expected mount of retiring jockey AP McCoy - should be amongst the favourites while the Paul Nicholls-trained Rocky Creek is also likely to attract plenty of interest.

However, over the last 19 Grand Nationals the favourite has won just five times, showing that picking a winner can be a tricky task.

Here's Kevin Garside with his top tips on how to pick a Grand National winner...