Simultaneous provide

I'm just about to jump back onto the BT Wholesale network from LLU after a few years with various providers.
How does the simultaneous provide work? Is the phone line migrated back, and then a broadband provide done during the same job? Or is it a day after? Or is it something different?
I'm a little confused by it after seeing the LLU guys just 'switch it on' after the line has been jumpered on migration day.
TIA!

Should be same day.

LLU is invariably a simple switch on as far as the consumer is concerned, apart from the times when it goes wrong, so in that sense it is just like Sim provide.

In my experience its the phone first usually early hours then broadband between 8am-1pm

Thank you both.
Well, it went live on Saturday - though I didn't notice any downtime. My router was preconfigured for Plus net, so it just reconnected. To be honest, the only reason I noticed is that the sync speed is different!