Sorry this is going to be a photo heavy post!

Woody has a tendency to overbend, but it tends to be worse when other people ride him (he will either be a giraffe or tuck his nose into his chest). He can be quite nervous under saddle and is still quite green mentally - he is quite a worrier if something goes wrong and will occasionally throw a strop if he doesn't understand. I think he has been ridden harshly before (more than likely from an eventing background) and he is scared to get something wrong.
These photos are from the end of May (he has been out of real work for a while due to my exams and colic and now this heat - he just comes in sweating from the field!)
This is not me riding him but I have permission from the rider to post these pictures. He has bone spavins and a weakness through his pelvis due to a previous fracture but still has quite big strides and movement. They aren't the prettiest pictures to look at but I think they help to get my point across, and it will be interesting to see whether the overbending is coming from the rider, the horse or both. The rider here rides with hands differently to myself (these photos were taken as I wanted to see how the saddle was moving with him with me on the ground!)
*photos removed*

He seems to have 'released' more here, so maybe the rider is checking him too strongly other times?
When he extends his overbending gets worse also...
Any opinions/observations? I know his anatomical weaknesses will not be helping him but he overbends worse with other people riding him (with me he will curl back a bit in stretching work but he is getting the idea of keeping his head vertical) which suggest a different style of riding is exaggerating it?