Advice from landlords please.

Hi guys,

So a little insight, Me and my partner and moving at the end of the month, our rent day is on the 25th and our current LL is aware we’re moving out on the 30th.

I know how all tenancy’s are different in regards to paying rent, however ours says

“The first month's rent in the sum of £… shall be payable in advance on or before the (insert move in date) Thereafter rent will be payable in advance at a rate of £… per month”

From what I gather, this means I pay for the time I’m staying in advance and not the days I have spent there? So in other words on the 25th I pay for the 5 days I will be there up until I move out, or do I owe the full amount + the 5 days?

(I just want to be 100% sure before I pay + I know I can ask my current LL all this but me and my partner have had a lot of issues with him and I don’t want to be taken for a ride. Any help is much appreciated)