Trying to work out which parts of my ESA are CB or IR for migration purposes

The DWP's letters are really confusing, because even when I was receiving only CB-ESA the letters all said "The payment of ESA is based on your National Insurance Contributions and any additional amount the law says you need to live on" and then said "Your total income-related amount is", and they continue to say this now that I'm receiving both CB-ESA and IR-ESA, with no separation of that components.

In 2013 I was migrated from Incapacity Benefit to CB ESA and I was also receiving DLA but I wasn't assessed for IR at that time, so I just received the basic £73.10 plus the extra £36.20 for being in the Support Group, totalling £109.30, but there was also a few pounds top-up "to ensure that you won't see a reduction in the level of your benefit entitlement as a result of the change to ESA".

Then in April 2015 I started receiving IR-ESA (and a small backpayment to 2013 as I should have been receiving it from the outset) and I got an extra £15.75 ESA because of the Disability Income Guarantee, but my £11/week pension was deducted from the IR-ESA, so I only received about £1.50/week more than the previous year, on top of the CB-ESA (the £2.75 top-up transitional protection, which appeared on my February 2015 letter, was no longer there on the April 2016 letter).

Then in 2017 I was migrated from DLA to PIP and was awarded the enhanced rate for both parts and my February 2018 ESA letter shows that I started receiving extra ESA "because you are severely disabled" as well as the Disability Income Guarantee and I continue to receive those.

Are both the extra ESA "because you are severely disabled" and the extra ESA for the Disability Income Guarantee components of IR-ESA rather than CB-ESA, such that those parts will migrate to UC, and only the basic amounts that I was receiving when I was on CB-ESA, before I started receiving IR-ESA too (currently £92.05 + £48.50 for being in the support group = £140.55) will migrate to New-Style ESA?

Hi spaceman, i am exactly the same as you going from incapacity to CB then being switched to part IR and having DLA then to PIP and higher rate on both components which added extra rates on my ESA. I am so confused what i am actually on and am due to migrate to UC in a month!

Looking at the ESA-UC migration guide, it seems that we'll get transitional protection so that our UC is not less than our current ESA, but each year that will be eroded as the basic UC amount, and our New-Style ESA and our rents increase, so over time we'll end up receiving much less than we would if we'd kept receiving ESA+Housing Benefit.

Presumably anyone who's an owner-occupier and is receiving any housing-related payments in their UC to cover the service charges will also have those deducted from their transitional protection, so they'll be worse off too.

Do you know if any increase in respect of Housing Costs (rent and/or service charges) definitely affects the TP?

Currently I receive £229.47/week ESA (after deducting my £15.18/week pension) which is £994.37/month, whereas on UC if we ignore the transitional protection for now, I'd only be entitled to £823.41/month UC (standard+LCWRA), and that's before deducting my £15.18/week pension and my £140.55/week CB/New-Style ESA which comes to £674.83/month, leaving £148.58 UC. So without TP I'd be £170.96/month worse off.

I also currently receive £608.87/month Housing Benefit for my rent+service charges, and I'd receive the same amount as Housing Costs element under UC, in addition to the other components, but say my rent and/or service charges increases by £25/year and the Housing Costs element rises accordingly, will that decrease my TP by the same amount so that in 6-7 years it will all be eroded and I'll be considerably worse off as a result of migrating from ESA to UC?