The regulations do require people to keep at least 10 metres away from seals.
Having said that, I think judgment is exercised. One doesn't want to provide photo opportunities that might just further the cause, not if it's not necessary, if there's no interruption of the hunt or no real problems.
I stand corrected: it has to be 10 metres away from sealing, not from the seal. So I'm not sure any regulation was broken.