I asked the fleet company (NHS Fleet Solutions) to use my existing account, so far it seems to be working - my referral code (to give to others) appeared shortly after RN was received.
Have a look at Zap map and see what other rapid/destination chargers are out there, i've not got my podpoint installed yet and it will be a few months due to electric work having to be done, I signed up for a polar plus account and trialling that for destination charging in car parks near to work, and found a 50kwh charger in my village at the local morrisons so I should be ok for now.
You won't get your VIN until it's ready to be loaded onto ship, or slightly after the ship sets off. In terms of RN, be ready to wait a month or so, NHS FS use 3rd party companies to order the cars so communication problems sometimes come from that, I spoke to NHS FS for about a month (calling them weekly) until I got my RN. When I put the order through I specifically asked them to use my Tesla account that i'd set up and gave them the referral, i'd also been in touch via email with tesla for the test drive, I was asked on email to let them know when the order went through (could have been for the Leeds SC team to get commission??) so when I did that I gave them my referral code also, the guy on the email said he would ensure that the referral was linked to the order. i'm picking up my M3 tomorrow, I'll need to supercharge as i've not got my home charger sorted yet so i'll see if I actually have referral miles.
Haven't got the experience with Octopus or direct with Lex, but with my lease provider (NHS Fleet Solutions) and IIRC most other lease companies, due to the fact it's not your car you probably won't be able to upgrade the LR at all, unless you specify it in the original order (not sure if you can do this though - speak to octopus et al to see if this can be done). I've got the LR, it is fast enough, yes the P would be your better option if you want the SPEED, test drive a LR, then possibly a P and that'll give you some idea, personally Oi wouldn't go for the P as i'm 100% satisfied with the acceleration of the LR. I know some people will say just go for the P, but how often actually would you need the P's speed? Save some cash and just stick with a LR.
You need to specify the car with your leasing company at the time of order. Just be aware though that the 'extras' tend to be financed over the length of your lease and so your monthly payment could get very high very quickly. It's good advice from @fancealot and I would really think twice about the need for that acceleration boost. It really isn't something you will need to use very often - the LR is more than adequate off the blocks. If you can shop around for a quote from the finance companies it is often worth it but appreciate you may be tied to Octopus EV.
