assuming a leadership challenge is launched by members of the parliamentary party (the media seem to think it's likely), i'm trying to get my head round how it'll work.
http://www.bbc.co.uk/news/uk-politics-36658985
in order to stand, the above link says any candidate needs support of 20% of the party MPs (which is near enough 50, i think - it says 15% if there's a vacancy but since Mr Corbyn has no intention of resigning that doesn't apply). so, assuming he stands (he's said he will), are there that many MPs who'll support him? since nearly all of Mr Corbyn's support comes from the grassroots membership (and it'll be them that elect him), is it fair that the parliamentary party effectively has the final say on who can stand for election?