The link between tattoos and mutilation is a poor one. We move on, acceptable standards do the same. Many a pilot, airline and military alike are to be seen sporting "ink" these days.
Full sleeves of "tribal ink" would, at most if not all airlines be outlawed for public display but subtle proud adornments are commonplace and in todays society bare absolutely zero correlation between a person's ability (moral or practical) to Pilot an aircraft.
The rebellious days of mutilatative Goth Tats for shock and horror purposes are very much confined to the minority these days. However, for more mature members of society, todays tattoos may still be synonymous with those of yesterday, and very different side of Britain.
Regards
CR