By BBC Sport's Honest Frank
Result: Sanders 190-190 Spencer
All the action as it happened from the final day of the Flat racing season where Seb Sanders and Jamie Spencer dead heated for the jockeys' championship.
SANDERS v SPENCER
Age: 36, Weight 8st 4lb
2007 Wins 190
Age: 27, Weight 8st 6lb
(All times GMT)
1550: Jamie Spencer is joint champion jockey with victory in the last race of the campaign on Inchnadamph.
He stalks his rivals like an assassin, and then shoots clear in the final furlong to leave him and Sanders level on 190 winners apiece.
Spencer leans down to pat and congratulate his horse.
The title is shared for only the third time in Flat racing history.
"I am choked. It has been so mentally draining over the last month," said Spencer.
1545: Spencer shares the title after a copybook ride on winner Inchnadamph.
"But this is the best result for the racing world, there could be no other. It is a straight draw, we didn't give up four or five days ago when we were level, we went right to the end.
"I admire Seb Sanders so much. He is as tough a rival as you could ever have. His Dad and my Dad are best mates so there is a lot of history there. I am so delighted."
Sanders 190-190 Spencer
1530: Spencer has covered more than 2,000 miles travelling up and down the country, chasing winners, in the last 48 hours.
Now it's down to one race over two miles.
As Spencer steadies his mount near the stalls, Sanders is entertaining the racing press with anecdotes in the parade ring.
1515: Outgoing champion Ryan Moore wins the November Handicap on Malt or Mash.
It means Sanders cannot be passed and is guaranteed at least a share of the jockeys' championship.
He finished down the field on John Terry, but the beaming jockey blows a kiss at the TV cameras and declares: "It's probably the nicest loser I've ever ridden."
Sanders knows Spencer can draw level with a win in the last. "I wish him well. I hope he does it," says the jockey, who is just glad to join the list of champions.
"My name's on the list now."
The roll of honour boasts names such as Gordon Richards, Lester Piggott, Frankie Dettori and Kieren Fallon.
1505: Kevin Darley, champion in 2000, comes out for his last ride as a professional jockey.
He leads out all the riders for the day's feature race, the November Handicap.
Darley is retiring. And he's only 47.
1455: John Terry (the horse, not the England skipper) takes centre stage - the mount of Sanders in the penultimate race. It's his last ride of the year. If he wins, the Englishman is champion.
But Spencer's hope Pippa Greene looks to have better claims. A win would put him level. It's the tightest finish to the jockeys' championship for at least 20 years.
1445: After more than seven months, and a combined total of 2,000 rides for the two jockeys, the championship will be decided with the final two races of the season (1510 and 1540).
The winner will be known in an hour. Or might we have joint champions for the first time in Flat racing since 1923?
As most of you will know, Steve Donoghue and Charlie Elliott shared the honours that year.
1438: It's a photo finish for Sanders. But his mount Borderlescott loses the verdict, and he remains just one ahead, with two races to go.
Borderlescott looked to have clinched it, but current champion Ryan Moore denied him on 8-1 chance Galeota.
A stunned Sanders shakes his head, and well he might, because his runner in the final race has been withdrawn.
Backbord will not run in the 1540. That means he only has one ride left, with Spencer down for two mounts.
1425: A couple of football stars are about to come on the scene - Zidane and John Terry.
More of John Terry later, but Zidane is a five-year-old horse trained by James Fanshawe, and named after the former French international.
Spencer looks serious as he goes out to mount Zidane. Sanders jokes with fellow riders while preparing to partner second favourite Borderlescott.
Punters have piled on Greek Renaissance, the mount of a certain Mr Ahern, who took such an untimely tumble earlier in the day. They're off at 1435.
1405: Still one in it as Spencer finds trouble in running on Gull Wing and can only finish fifth.
Gull Wing was boxed in and bumped, and could well have been closer with a more fortunate run.
1355: There's a chance for Spencer to draw level in the next (1405), as Sanders is again without a ride.
And guess who's riding the favourite? Yes, Jamie's aboard Gull Wing, although the horse's best form previously has come on softer ground.
1345: It's getting nervous now for punters and jockeys.
The championship will be officially shared if the top riders finish on the same number of winners.
But for purely betting purposes, bookmakers would declare Sanders the winner, based on more second places.
1335: Spencer bounces back, and is now only one behind.
Sanders blazed a trail on 16-1 chance Mudhish, but Spencer pounced at the right time with 4-1 favourite Generous Thought.
Sanders 190-189 Spencer
1315: Next up is the 1330, a nursery handicap over six furlongs. There are four non-runners, leaving an 18-strong field.
Spencer has a strong chance on Generous Thought, but must be wondering if the title is slipping from his grasp.
"That's not the title yet," Sanders tells reporters, but he rides Mudhish, who should relish the fast ground. The going at Doncaster is good to firm.
1305: Heartbreak for Spencer as he is headed on the line in his second race of the day.
The Irishman put his head down and gave everything on Minus Fifteen, but Darryll Holland on favourite Premier Danseur wins by a whisker.
Sanders 190-188 Spencer
1258: Spencer needs a win quickly, and with Sanders missing the next race, it's his chance to capitalise on second favourite Minus Fifteen.
1240: Sanders goes two clear, and his luck looks in with a bizarre finish to his first race of the day.
Spencer's mount was behind as his rival slugged it out with Eddie Ahern on Omni Cat.
But just as Ahern vied for the lead, he was thrown off his mount, to leave Sanders with a crucial win on 11-4 shot Incomparable.
Sanders 190-188 Spencer
1230: Spencer is on Horatio Carter, Sanders rides Incomparable in the first race. Let battle commence.
1225: Time for some introductions, and it's England v Ireland...
Seb Sanders, 36, boasts bright highlights in his hair but is a veteran of the weighing room. A down-to-earth character, he is a big Birmingham City FC fan, and making the most of the chance to be champion.
Jamie Spencer is 27, but would struggle to get served in some pubs. Nicknamed the 'Babyfaced Assassin', the Irishman won the title in 2005, and is the godson of Coolmore Stud supremo John Magnier
1215: The riders are set for the opener, with Sanders rated a slight odds-on favourite to claim his first title ahead of former champion Spencer.
(Placing or approximate betting)
Sanders - 1230 Incomparable WON 11-4, 1330 Mudhish 3RD 16-1, 1435 Borderlescott 2ND 4-1, 1510 John Terry UNPLACED, 1540 Backbord NON-RUNNER
Spencer - 1230 Horatio Carter UNPLACED, 1300 Minus Fifteen 2ND 9-2, 1330 Generous Thought WON 4-1f, 1405 Gull Wing UNPLACED, 1435 Zidane UNPLACED, 1510 Pippa Greene UNPLACED, 1540 Inchnadamph WON 9-4