Had this discussion last week with Melanie Giles my IP (assuming acceptance of my IVA proposal). My understanding is that you can keep any lump sum but your monthly payments have to be taken into account as part of your monthly I&E. Hope I've got that right Melanie.
You have Mikey - because that is what your IVA proposals actually say explicitly. Other firms may use other terms, so the answer may not always be the same - and the annuity payments following the pension draw down will form part of the ongoing disposable income.