A family have cashed in a bet on Red Rum winning the Grand National 43 years ago - after discovering an unclaimed betting slip.

Bob Holmes found evidence of the £1 bet while going through his late father-in-law's paperwork.

Through a shop code, William Hill found that the bet had been placed at odds of 11-1, meaning a payout of £12.

But the firm decided to add inflation, making it £130. They also gave out £130 in bets and donated £130 to Water Aid.

For this year's race Mr Holmes has put a £20 each way bet on Blaklion while his wife Nancy has has put a £25 each way bet on favourite Definitly Red. Nancy's sister Rhonda Robertson has put a £20 each way bet on Ucello Conti.  

Image source, Rex

Fifteen women have lined up on the Grand National startline, but we are still awaiting our first female winner of the big race.

Katie Walsh has come closest to hauling in that landmark, finishing third on Seabass, behind Neptune Collonges, in 2012.

Despite injuring her arm in Thursday's Foxhunters' Chase, the 32-year-old is back for another attempt at emulating older brother Ruby's two victories.

She is in charge of the Paul Nicholls-trained Wonderful Charm today.

Frank Keogh
BBC Sport at Aintree

The old winner's enclosure is now a bar, named McCoy's in honour of the retired 20-time champion jockey Sir Anthony McCoy.

A portrait of McCoy overlooks punters, which is somewhat ironic - as the Northern Irishman has always been teetotal.

Image source, BBC Sport

Still not picked your Grand National fancy?

There is still time. But not much. 

Fortunately BBC Sport's Frank Keogh has cut to the chase and crunched the form book down to 40 easy-to-digest paragraphs.

Tuck in and lump on. Sensibly of course.

Image source, PA

I'm not sure if this is a hat or the remnants of a birdstrike.

Cornelius Lysaght
BBC horse racing correspondent at Aintree

For Colin Tizzard, that’s now five winners in four days and four for Robbie Power. There’s just no stopping him.

Frank Keogh
BBC Sport at Aintree

Local bookmaker Pat Whelan is on course and tells me he expects to take more than £10,000 in bets on the Grand National.

"I expect we'll take 2,000 wagers throughout the whole afternoon, but the National is the big one," he says.

"It's the hardest race in the world to predict - everything has a chance.

"Definitly Red seems to have captured imaginations, particularly with Liverpool supporters."

Latest odds:10-1 Definitly Red 14-1 Blaklion 16-1 Pleasant Company, More Of That, One For Arthur 18-1 Cause Of Causes 20-1 Bar

Jockey Robbie Power speaking to ITV: "He can be a bit awkward but when you grab a hold of him and point him at a fence he really goes. I needed convincing when looking at the form, but I have to give credit to owner Alan Potts who was sure he could do it."

Power rides Regal Encore in the Grand National. He is hotter than a vindaloo.

Image source, Reuters

1. Sizing Codelco R M Power 10-1 

2. Rightdownthemiddle J W Kennedy 16-1

3. Starchitect T Scudamore 5-1 

4. Potters Legend L P Aspell 9-2 Fav 

Image source, Reuters

Sizing Codelco comes home to make it a fourth win of the meeting for the combination of jockey Robbie Power, trainer Colin Tizzard and owners Ann and Alan Potts.

Image source, Reuters

Sizing Codelco and that man Robbie Power is going to romp home...

Sizing Codelco leads from Starchitect as they turn for home.

Image source, Reuters

Potters Legend is showing at the front as they clear the fifth from home. Our Kaempfer looks out of contention.

With eight to go, I Just Know and Emerging Force are sharing the lead.

Sizing Codelco is well positioned just behind.

Image source, PA

Next up is the Handicap Chase. 

Starchitect came a good fifth at Cheltenham that could easily have been better. This trip - three miles and a bit - is a step up

Sizing Codelco is the shot from Colin Tizzard's yard and that team has had the Midas touch so far at the meeting and the doubts over stamina might not be a factor today.

Potters Legend is the 9-2 favourite though. Fourth in the Kim Muir Chase at Cheltenham which was a competitive race.

We are go.

Image source, Getty Images

According to some weather forecasters, you are more likely to burn in April than in the height of summer.

I'm not sure whether that is a result of science or human error, but there will be some tender limbs tomorrow morning. As well as sore heads.

BBC Radio 5 live

No-one does drama like Des Lynam.

Just as his announcement of Ben Johnson's positive drugs test at Seoul in 1988 sent shockwaves through sport, so his interview with clerk of the course Charles Barnett defined the IRA bomb threat that postponed the 1997 Grand National.

There are some fascinating stories of high-level decisions, panic and hospitality from that day on the BBC Radio 5 live Evacuate Aintree programme.

Frank Keogh
BBC Sport at Aintree

Horses with Red in the name have won the National five times in the last 50 years - Red Alligator (1968), Red Rum (1973, 1974 and 1977) and Red Marauder 2001.

And BBC Radio 5 live racing reporter Derek Thompson believes it can happen again this time.

"Forty years since Red Rum won his third Grand National it would be fitting if a horse with Red in its name triumphed again and Definitly Red looks to have the credentials to do just that," he said.

Thompson's National 1-2-3-4:1 Definitly Red 2 Highland Lodge 3 Cause Of Causes 4 The Young Master

BBC Radio 5 live

Danny Cook will be on board Definitly Red today.

The son of a landscape gardener from Romford, the 33-year-old's first trip to a racecourse was to the National in 1999, when he was clutching a betting slip backing the winner Bobbyjo at 10-1.

As a 15-year-old, I'm sure he was merely holding it for his dad.

He served a six-month ban for cocaine use in early 2015, but could be at the summit of the sport come 18:00 BST.

"I'm very relaxed at the moment. I fell straight to sleep last night. The closer the race I have got the more relaxed I have felt. I have visulaised every possible scenario about a million times," he told BBC 5 live's Breakfast.

"I think he has got a fantastic chance. I think if I get him in a good rhythm early he won't be far away at all.

"Everyone likes a comeback story. Fingers crossed it can have a happy ending."  

Image source, Rex Features

Here's one contender who might attract the backing of one half of this great footballing city on name alone.

Definitly Red - it is believed that the individual tasked with filling out his registration papers took their eye off the ball - has some serious credentials though.

The Brian Ellison-trained runner is not over-burdened by the handicapper and has won three races this season, including a success over 2016 runner-up The Last Samuri in  Doncaster's Grimthorpe Chase.

Jockey Danny Cook has rebuilt his reputation after serving a six-month ban for cocaine use in 2015.