Andy - yet again I think that you have had the wool pulled over your eyes by your previous provider. IPs must keep all client monies in a separate interest bearing client account - I have over 700 of them running at the moment! - and it is a heinous crime to mix client funds.
With regard to bankruptcy cases, these monies are held by the Bank of England, and IP's do have to apply and wait for the monies, but this is usually turned around inside a week.
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
To have me propose an IVA for you, please visit:
http://www.melaniegiles.com/ivaEnquiry.asp
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http://www.iva.com/iva_companies/IVA_Advice_Bureau.asp