I am 100% in favor of feeding live as a jumpstart with I tricky eater, I've had to do it as well.
But based solely on what I've read here on this forum as well as other sources, it seems that feeding live in the UK is unheard of. I don't live there, but have read many times that this is the case.
Which leads me to question whether or not there are snakes that are "lifers" on live prey, refusing any other prey options. Or are we just doing things differently in the US than they are in the UK?