Did the Labour Party deliberately hire an interim?

Since his election, hundreds of articles have been written about Jeremy Corbyn's  electability and whether he even wants the top job.  But I wonder if the Labour Party, understanding the need for dramatic change after Ed Miliband's performance, have  actually appointed an interim... It takes a brave organization to employ someone completely different from the usual hire, but as Einstein once said, doing the same thing you’ve always done and expecting a different result is the [...]