BBC Sport Online's Frank Keogh asks the experts, and a complete amateur, for their tip and an outsider in the Martell Grand National on Saturday.

BBC Five Live racing correspondent Peter Bromley, preparing for his 41st - and last - radio commentary on the Grand National.

I fancy Earthmover each/way, although I'm worried about his jumping. He's in form and so is the stable.

Others with chances are Moral Support or Edmond.
Pick: Earthmover. Alternative: Moral Support or Edmond.

Racing Post journalist Alastair Down: It will be won by whatever can plough through the ground.

I backed Edmond some time ago, and he will be wearing blinkers for the first time in a long while. I think it's a worse race than last year and Mely Moss may have a better chance.

There is the strong possibility of a single figure number of finishers, some of which will be literally tottering up the run-in.
Pick: Edmond. Alternative: Mely Moss.

BBC TV racing commentator Richard Pitman, whose son Mark trains Smarty in the Grand National: Because of the ground, I think there will only be six finishers and you can back that on spread betting.

With a spread of nine to 11 finishers, if I sell at nine, any number of finishers below nine will double my stake at the very least. I'm going to back last year's winner Mely Moss, who I tipped at 25-1 last year. It run so well in finishing second last year when its breathing was not right.

His breathing operation can make the world of difference. The ground brings in Edmond, who wants it virtually unraceable and Moral Support, who was bought for just eight grand.
Pick: Mely Moss. Alternative: Edmond or Moral Support.

Wolverhampton Express and Star racing editor John Sexton, who is president of the Horseracing Writers' and Photographers Association and recently won �250,000 on the Who Wants to Be A Millionaire TV quiz show.

My original choice was Beau. I thought he was an ideal type for it, but I think the ground has now gone against him. The bet in the race is more likely to be Edmond because the ground has definitely come right for him. He is sure to stay.

Brave Highlander, who is 13 now, ran very well last year when fourth, and you could do a lot worse than him. It's also 20 years since Aldaniti, who has the same trainer.
Pick: Edmond. Alternative: Brave Highlander.

BBC Five Live racing commentator Lee McKenzie: Moral Support is my selection, with Village King an outsider. Moral Support has everything you want in a National winner, particularly if the ground gets particularly testing - he has the speed to win over three miles but the stamina to go over a lot further.

Village King was going very well in the race last year when he fell at the 20th fence.
Pick: Moral Support. Alternative: Village King.

Irish Times racing correspondent Brian O'Connor: With all this rain, you will need something that goes in the ground. My outside bet would be Hollybank Buck, who is just 1lb out of the handicap.

He's very slow, but stays very well. The softer the ground the better. Edmond won the Welsh National on soft ground. For a horse who has done that, a weight of 10 stone is nothing.

He's a proven race winner, with a top jockey and a low weight.
Pick: Edmond. Outsider: Hollybank Buck.

Bob Champion, the jockey who beat cancer to win the Grand National on Aldaniti 20 years ago: It has to be Beau. He is such an impressive jumper and won the Whitbread Gold Cup in brilliant style last year.
Pick: Beau.

Birmingham Evening Mail racing editor Bob Downing: I like Smarty because of the Pitman factor. Jenny said when she retired that she was leaving her son Mark a National horse and this was it.

Spanish Main is out of the handicap and is not Nigel Twiston-Davies' first string, but I think he can run a big race. He seems to be improving.
Pick: Smarty. Alternative: Spanish Main.

Racing broadcaster Geoff Lester: I have to go with Papillon, last year's winner. He's only gone up 9lb in weight, and you have to go back to Grittar in 1982 to find the last winner who only went up by that amount.

And we haven't had a double winner since Red Rum. He ran well last year and seemed to be enjoying it.
Pick: Papillon.

Former jockey Graham Bradley, second in the Grand National on Suny Bay in 1998: Without Papillon, I thought Mely Moss was the nearest thing you could get to a good thing.

I still think he will win. Trainer Charlie Egerton is very pleased with him, and he seems to go on any sort of ground. Good to soft would be his preference.
Pick: Mely Moss.

And from a man who admits he is not an expert: Spencer Lynch, a 28-year-old taxi driver from Kirby, Liverpool: I picked up a guy from Liverpool airport a couple of weeks ago and he was here to check out the foot-and-mouth situation and do some hotel reservations.

He said he knew the famous racehorse owner JP McManus and to keep an eye on a horse called Beau. I have no reason to doubt the guy - he looked like he had a few bob.
Pick: Beau.