Charlie isnt as old as what people make out, he must only be around 8 or 9 years old. He was one of the final offspring of Ronnie (former dominant pride A male, then onto newquay) so he has a few more years in him anyway. Pride A is a retired group anyway.
Blair drummond already keep 3/4 males
Woburn could be a possibility, as their pride male looks like he is on deaths door anyway
Knowsley have more than enough males to get rid of
I'm surprised Newquay zoo haven't taken one on, to replace Ronnie. When i emailed them a while ago they said there was no plans for another male lion.
Looks like longleat may have to castrate the boys!