Has a trainer ever rode for another yard when they have one in the race

Not that I can remember.  A conflict of interest, surely. Amazing how it's allowed but this is the UK, so anything goes.

Ged required for this question.

some yards sponsered by bookmakers a confict of interest shirley

i wonder if denis hogan did ?

TAUNTON 4:45 South West Rail Solutions Ltd Open Hunters' Chase (Class 5)

Shearer: 1 Miss Olive Nicholls(3) Paul Nicholls 9yo g 12st 6lb
Didero Vallis: 5 Mr Daniel Williams(7) Miss Olive Nicholls 12yo g 11st 12lb

Richard Guest did it in the 2003 Grand National. He trained 2 in the race (Red Striker and Red Ark), but rode Chives for Henrietta Knight. Chives was only 10/1, and the 2 he trained were 50/1 and 100/1, but they both got further than Chives did. None of them completed.

He was intending to do similar the following year, with 2 entered for the race, and he took his licence out to ride one of them, but was banned from doing so after complaints (including from the ROA) following his exploits the previous year. The Jockey Club said their rules had been unclear, and that they would update them. In the end, neither ran. I can't remember why, maybe he sulked and took them out. And I don't know what the rules say now.

...not really 'similar', but he would have been riding against a horse he trained, which the Jockey Club took exception to.

Sounds similar to me except Guest wasn't an establishment figure

Sorry, I meant when used I 'similar' to compare his 2004 intention (to ride one of the 2 horses he trained) with 2003, when he rode one for another trainer in the race.

And yes, I'm sure Olive Nicholls will be more popular with the ruling body than Guest ever was.

Perhaps different rules apply in hunter chases. I don't know.

I'm sure there have been many instances in hunter chases over the years of trainers having more than one horse in the race, and riding one of them. There was a memorable one in the 1970s, when John Thorne ran a brother and sister (both out of Air Wedding), that he bred, owned, and trained, and rode one of them, in a hunter chase at Worcester. They dead-heated, with Philip Hobbs riding the other one.

An article in the RP quoting the rule about her riding, seems to be the case that it is Hunter Chases and being a permit holder that allows her to ride.

Seems an obvious potential 'conflict of interest' whatever the rules state.

Watching with some interest, though the odds difference also might be some factor here anyway!

It’s the most disgraceful things I’ve seen since the Flockton Grey incident.

Hope I'm not wrong here but I believe Derek Ancil trained when he rode Merryman in the Grand National for Neville Crump.

Sorry. Didn't read the OP re riding and training in same race