UC migration from esa and transitional Protection

Hello hope you can help. I’ve received the UC migration letter and needs to be completed by 27th June.
My question is my rent at the moment is £1150 and on the first June it is the amount I will pay, but my landlord has increased it and that starts in July a few days after I send my UC online by £100. In the rent do I put £1150 which I’ve paid for that month or the increased amount £1250 which will be paid in the few days after in July and for the next year, I have the tenancy agreement updated to the new amount starting from July?

Also I hope this doesn’t alter the transition protection I will receive?
Any advice will be appreciated as I don’t know what to put.

When you say assessment period is that the last date to apply? Sorry my brain is not functioning today.
My last date to apply to uv is 28/6/25. I was thinking to apply maybe 25/6/25. I have already paid my June rent as it goes out on the 1 st of each month so the next rent after I transfer to UC is going to be the rent increase.
Does that make sense

Ok so on the 1st of June I’ll pay the old rent. Then I have to migrate before the 28th June which I was thinking I’ll do around the 25th June so on the 1st of July my rent increase will show my new rent. Which is a week from applying to UC, that should be ok?
Also do I then show my new tenancy to the Dwp ?
Thank you for replying as I’m worried that not only do I have to pay an extra £100 pm rent but if the TP eroded then I’d loose out another sum of money also.
Sorry this is so confusing