Hi Marie
It would take too long to provide you with a definitive listing, and this is something more for your IP to be concerned with rather than you.
All I will say is that these three firms are large international accountancy practices with enormously high reputations in the insolvency field. I, myself, was a manager with PricewaterhouseCoopers for a number of years.
They all represent a number of creditors and have fairly strict methods of reviewing proposals to ensure that their clients are getting the very best return possible. As an IP in practice, I deal with all three firms pretty much on a daily basis, and find them extremely commercial and fair.
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
For further details contact me at
http://www.melaniegiles.com and view my IVA blog at:
http://melaniegiles.blogs.iva.co.uk