When do I cancel my Direct Debit?

Hello - my transfer to Bulb and first payment happens tomorrow (28 February). Should I now cancel my Direct Debit with my current provider prior to them sending me the final bill?

That would complicate matters as your current provider wouldn’t get their money!
Once the final bill has been paid - then cancel the DD.

As above, I’d wait until the final bill has been settled.

OK thanks.