FIXED!!!!!
Save the image to a file Not camera roll and it will load onto affinity fine.
Back story if interested:
Raws files are the only ones i found to be affected jpegs are fine. so in this post i am only refering to Raw files unless otherwise stated.
This was driving me insane so i experimented with bit size of file and in camera colour file change, portrait and landscape, various sd cards and ssd various cables and ways of not only taking the photo from camera to ipad but also ipad to affinity. And have found it to be not a affinity problem but i think a ipad issue. I found that with the new update 13.5.1 when i plug my camera (nikon5300) into ipad via official lightning adapter and IMPORT the images to carmera roll they go in fine and i can export them onto a external ssd or sd or place them in a file fine. But if i take the sd card out of the camera and use a usb card reader and lightning adaptor and SHARE/SAVE them into carmera roll the arrive totally pixallated. Even if i use the good images in camera roll and export to ssd or a in-ipad-file and then share/save them back into camera roll those same images come back pixallated. Furthermore if i load a good file from camera roll onto affinity in portrait it comes onto the screen pixalated and flipped where as landscape images come through sometimes piaxalated sometimes fine and somtimes fine but in photo persona not develop where as as i mentioned in my previous post the images are all good when they come from anything other than camera roll. So for now i think i will stop using camera roll at all and just save work to files.
Hope this helps some people and i hope its fixed on the next update but to be honest i quite like the organisation of different photo shoot means different file instead of being lazy and just throwing all my images into camera roll as i used to.