Transfer to PIP

So I had the letter this morning saying that DLA is ending & inviting me to claim PIP. Couple of questions...

1)It says i need to phone them by 2nd June to start the process... but 2nd is a sunday so presumably they mean by Fri 31st? And presumably with the diifculties one often has getting through, it would be wise to ring on 30th in case we cant get through?

2) How long after the phone call does it usually take for the form to arrive? I need someone to help me with the form & everyone is busy so i'm hoping to give them a rough idea of whether it will arrive 2 days later or???? I know there's no hard 7 fast rules with these things but a rough idea would help

Thank you Gordon

1) just to clarify - you mean to give myself a bit more time before the deadline? my regular carer is on holiday until the 29th (deadline on 31st) so that would be earliest can ring. Gives us 3 days so hopefully that will be enough?
I do think it's unhelpful for them to say the deadline is the 2nd when the 2nd is a Sunday! It just confuses the issue.

2)Presumably the extension you're referring to is in how long one can take to fill in & return the form? Or did you mean asking for a delay before the form arrives?
Either way I am wondering on what grounds an extension would be granted?

Thank you.

Do we know on what grounds they would likely grant an extension?

My letter to change over came middle March. I had to phone them before the 30th. I did that and received the form 10 days later. Filled it in, sent it back recorded by 26th April. Received a letter to attend an assessment 14th May...hope that helps.