From what I can gather from online communities who have watched infinitely more games in the UK than I have going back a very long time, it probably always happened, they just would never think about stopping the game for a medical emergency in the crowd.
Probably a combination of a different era and the fact that the physios in the not too distant past probably weren't medically trained and didn't have much state of the art equipment beyond numbing spray/the magic sponge anyway. You would occasionally hear "if there is a doctor in the crowd please report to xyz" over the tannoy.
|