FYI, I contacted APL (Airport Pickups London) who we used on an Oceania cruise in May from Southampton and they will do a pickup from Portsmouth cruise port and drop us at the London Train Station we need to leave from to Edinburgh after the cruise. I just received a quote of L211. It may be a little pricey, but we prefer the no-hassle approach so we can make easy transfers for the remainder of our travel. Also, we aren't the lightest packers so we were concerned about the bus and local train transfers and those headaches. We did the Two Together Railcard for Great Britain and it was an easy 10 minute on line process and the discounts on all our train travel for the remainder of the trip covered the $35 cost several times over. Again, thanks for the car info!