You'll probably never see a bullet, because it would have been disposed of when they removed it from his hand. Things covered in blood are a biohazard, not a souvenier. They're not going to clean it up for him and be like, "Here you go!"
is that UK policy cause i have a few friends with things that have been "removed" surgically. One was hit with a stray arrow, another has a surgical pin that was removed, and another has 11 bb's from a stray shotgun blast. Besides, he should definitely have a medical report.