If memory serves at the time Aperture were recommending Sprout as there was an indirect connection but I am not sure what the current relationship is.
So the loan was in lieu of equity release and I believe Sprout contacted Aperture direct for a consent to variation which they gave within a day or so. ( I was not expecting them to react that quickly but the reason is stated below)
From applying to Sprout, getting approved it took just 5 days for the money to be paid to Aperture so the IVA was effectively closed.
So far, so good! but no it then took Aperture a further five months to issue the closure certificate and as Khallis3 stated a further 3 months before your name is removed from the Insolvency Register but check they do it as I have heard they make a lot of mistakes.
https://www.insolvencydirect.bis.gov.uk/eiir/
The delay was caused by the final checks and balances which is fair enough but also through SHL carrying out PPI check's. They probably lost interest when they realised that in my circumstances they would get absolutely nothing.
The other reason of course is that Aperture can hold on to the money and cream a bit more interest before making final distributions to the creditors
Also have a look at the forum on Debt Camel.
So in my case it took 8 months after payment was made before my name was removed from the IR and reading these forums there are a lot of people in worst positions.
When I got the certificate I did not think that 3 years on I would have to go on these forums again and still have to deal with them.
