According to the Hyndburn Council website:
The Council will aim to make all payments where it holds a live Direct Debit instruction by 30 April 2022.
The Council will aim to make all payments where it does not hold a live Direct Debit instruction by the 31 May 2022. the Council are currently developing an on-line application form for eligible households to complete and provide relevant bank details for payment of the Council Tax Energy Rebate.
https://www.hyndburnbc.gov.uk/counciltax/15/