I do actually know several people who have queue jumped to get vaccinated. They all have openly told everyone they did. This is not in the UK, so slightly different system. They do have priority groups similar to in the UK, but I don't quite understand how they are being managed.
One is healthy, 40 like me, they work in an office role (it is civil service, but they can wfh). She was vaccinated back in December, who knows why. She does have professional connections to the public health department, so probably just knew someone.
Another close friend is a uni lecturer, completely remote teaching, like me hasn't been on campus since March. She was vaccinated early January. Her employer is offering the jab private sector to all employees. She felt really guilty taking it, she's healthy and 30s (she will openly admit this herself). But she figured that she wasn't taking it from anyone else (because it's not like her employer was going to out of the good of their heart offer it to a non-employee who was a higher priority) and getting it was better than not getting it, so she went ahead.
I have another friend who is pregnant, IVF baby, and she has an elective c-section booked for March. Her doctor wanted her to have both jabs before her c-section, again, she's early 40s, health except for the infertility, but her risk factor was needing surgery in 2 months time. It's not even approved technically for pregnant women, but her doctor gave it to her anyway. Again, not UK and a private health care system, so I guess they can do what they want.
So it is definitely happening.