URGENT ! - start new job without BRP ?

Hi, I am changing jobs under Tier 2 (General). My new sponsor has assigned me a CoS and they have also certified maintenance on it. I have a few queries about this:
1) I believe I do not need to submit any proof of funds now or do I ?

2) Also, I will be applying early next week for the visa using the premium service as I have to relocate to another city next Friday so as to start my new job from 27th Oct. (Mon.) onwards. If I get my visa approval early next week but do not receive the new BRP in the post by 27th, can I still start my new job or not ? Should I wait to have the BRP in hand before relocating and starting the new job ?

3) And, can I give a new address to the UKBA to deliver the BRP to when I am at the premium visa service centre instead of my old (present) address ?
Kindly let me know ASAP. Thanks.

Any feedback ? Anyone ?

1. no maintenance funds needed if you have T2G leave at present

2. read para 202 of the T2 policy guidance: https://www.gov.uk/government/uploads/s ... _08-14.pdf

3. ask them