Your inheritance will be captured under the windfall clause and you will be expected to pay 100% of your original debt plus IP fees and possibly statutory interest.
If after the above money is left this would be yours. Your iva will conclude once the above is paid however would remain on file for the full six years from the start date.
Sharing from experiences of dealing with debt
There is a solution for everyone .... Just need to stay positive !
You need to inform your IP now that you are aware of the inheritance. They may propose a variation whereby statutory interest is frozen, some of the money is given to you for essential house repairs, replacement vehicle etc or creditors accept the money as full and final.
I hope you can get some benefit from the bequest as this was surely the intention of the person who passed away.
When you say that you are due to inherit, has the unfortunate event already occurred which gives rise to the inheritance, or are you just suspecting it might before the end of the IVA?