IT'S a national institution... just don't tell those Cheltenham Festival die-hards.

The Grand National runs tomorrow at Aintree, and it's a race that grabs the nation's attention - especially if they have a bet on.

So who to look out for? And where and when can you watch the race?

The favourites

Tiger Roll (age: 9; weight: 11-05) is THE favourite, having won this race last year and clocked up another dominant performance at Cheltenham last month.

Trained by Gordon Elliott, and ridden by Davy Russell, Tiger Roll is 7-2 (with bet365) and is perhaps too short odds to go with again in this lottery of a race.

Second favourite is Rathvinden (1; 11-00), trained by Willie Mullins with Ruby Walsh on board.

This horse put in a fine display last time out, and Walsh has won this race two times before – you can expect odds of around 9-1 for this one.

Coming up in third is Vintage Clouds (9; 10-04) at 14-1.

Trainer Sue Smith won the National six years ago with Auroras Encore, and jockey Danny Cook is being tipped to secure her another victory.

Also sitting at 14-1 is Anibale Fly (9; 11-10), which finished fourth in this race last year and second in the Cheltenham Gold Cup last month.

Could Tony Martin's horse, with Barry Geraghty on board, go one better tomorrow?

Rounding out the bookies' favourites, at 16-1, are Jury Duty (8; 10-11) and Lake View Lad (9; 11-01).

Somerset contenders

Philip Hobbs (Sandhill, on the road to Minehead), Paul Nicholls (Ditcheat, near Shepton Mallet) and David Pipe (Nicholashayne, Wellington) all have entries in the race.

Hobbs' is Rock the Kasbah (9; 10-13), to be ridden by Richard Johnson, is just outside the main favourites in the betting, at 18-1.

Nicholls' Warriors Tale (10; 10-13) has Harry Cobden on board and is a big outsider (125-1 as it stands).

Pipe, who won with Comply Or Die in 2008, has two entries - the relative youngster Ramses De Teillee (7; 10-09) and Vieux Lion Rouge (10; 10-06), which has completed the race six times but never finished higher than sixth.

Ramses, ridden by David Noonan, is a 20-1 shot, while Vieux (with Tom Scudamore on board) is 50-1.

Watching the race

The race is set to start at 5.15pm, with live TV coverage on ITV1 (and radio coverage on BBC 5 Live).

All odds from bet365 via, and accurate at the time of writing