Dwp address for pip mandatory reconsideration

I telephoned the dwp on the 25th of May to find out the position of my transition from dla to pip as it had been nearly 4 weeks since Face to face assessment at home. It was confirmed that a decision had been made & a letter sent that day.
As of 31st I still hadn't received the decision letter so telephoned again and they've sent a copy which I received on 2nd June.

I need to submit a mandatory reconsideration by Monday (as I'm going on holiday on Tuesday, and will therefore miss the 30 days) but the copy decision letter they sent doesn't have an address on it.

Could anyone tell me the address to send it to?

Also should I have received any other info with the original decision letter eg P4v3?

Many thanks in advance for your help

Karen