UC and P60u

I have been reading on forum about members who unwittingly didn't know they have been receiving some CB ESA alongside UC.

I potentially could be in same boat as have just double checked most recent P60 and it's definitely a P60u.

I have just migrated to UC (3 weeks ago), still waiting on payment amounts etc via journal.

Again double checked my journal and it says on anything that could affect UC ckaim and says i still receive ESA.
I did receive 2 week run on payment also letter to say IR ESA has ended.

My last employment ended around 2012.

What are the implications (If any) of P60u on UC claim etc ?

Thanks in Advance.

Hi David

Thanks for reply and info.

Does a P60u mean that i am actually receiving NS ESA ?

Could it mean that i would get a payment both from UC and another from ESA ?

Thanks