Delivery of Biometric residence permit (PSW)

Its a bit urgent so I hope someone can help.

We got on Saturday passports back with visas approved me and my family (which is great and amazing) but we should urgently travel home on this coming Sunday so I am I bit concerned since we did no get biometric cards yet...

I am wondering will they arrive before Sunday and if they do arrive and we are not home what will happen can we arrange redelivery? How do they send the cards? by royal mail?

Also we still have valid student and student dependant visas in the passports... can we travel with them? they are valid 9 days after we plan to return.

Thx

student visa is superseded by psw visa.

you wont be able to enter uk without biometric cards!

they send it via courier service. and they leave a note behind if u r not home