A UK private dentist gave me both bitewings and the pano for my Antarctic medical. On the other hand I wasn't allowed my gall bladder ultrasound from a private

A UK private dentist gave me both bitewings and the pano for my Antarctic medical. On the other hand I wasn't allowed my gall bladder ultrasound from a private hospital or my chest xray from the city hospital (but they gave me my ECG as a printout). I remember my gran always used to come home with her chest xray films. I can sort of understand the ultrasound as it's difficult to interpret, but could you GDPR it out of the hospital? I think the chest xray they just sent a summary to my doctor and not even the image. I assume they're worried about litigation.