Expiring Fixed Term ISA in Sep24 - Can I open a new one now?

Hello, I have 13k in a 1 year fixed term cash ISA that will expire in September 24, and started in September 23. I would like to start a new 1 year fixed term cash ISA now, but with 20k. Am I allowed to do it? That would mean that I will receive back my 13k plus interest in 2024, while I have 20k invested in another ISA account which will pay me back in 2025. It would also mean that I only invested money with one transaction in 2023, and same in 2024. Is this alright? Thank you.

Hi,
Yes you can open one now:
Individual Savings Accounts (ISAs)
Thank you.