Universal credit/New style esa

I have for a number if years been claiming ESA IR with the severe disability premium as a top up.Aroundca month ago I was I formed I needed to migrate to Universal credit.I was notified in my journal that I have actually migrated,and am waiting to see what monies I will receive
Today I received a letter from the DWP informing me that payments will be split between UC and New style ESA.I did manage to speak to someone at the DWP but to be honest I still don't fully understand why this has happened. Would someone be kind enough in simple terms what the move means,and if I will be worse off.I do believe that ESA NEW STYLE is not means tested so does this mean I could have more than £6000 in my bank without it affecting my Universal Credit? Thanks in advance

Hi David.I was told this morning when I rang the DWP that I was getting transitional protection,and I informed them in my UNIVERSAL Credit journal when I initially made my claim that I was covered for it too.
Yes I was getting full housing benefit when I was on IR ESA.

Thanks David,I am a little clearer now.
Just one more thing I am hoping you can advise me on. There is a paragraph in the letter I received yesterday which states I need to go and see a job coach at my local job centre to complete my ESA ( NEW STYLE) claim. Apparently they will create an agreement with me called a "Claimant Agreement" which I must accept.Failing to accept this will result in my claim being closed! Why is this a must and how can this be justified if prior to moving over to UC I was covered by being in the support group? I really am at my whitts end with the whole system.I am in 2 minds to tell the DWP where they can stick their monies and to start drawing off a private pension I have.Btw I am 62 yes old