As I understand it then...
Wasps going into administration means that they have to start in the Championship next season, subject to RFU approval (fit & proper owners, 5 year business plan, proof of sustainability etc.).
It also means the P shares are sold back to the Premier League at a price determined by an agreed formula (about £9m).
The bondholders have a first charge on that anything realised by the sale of the shares, it was part of the security for the bond issue, so that money goes to them.
I can't see any way that Wasps get out of this, it's basically where Worcester are right now.