The best bit? More details on the battery leasing, which says it could be as cheap as £45/month if you only do 4,500 miles a year. We don't drive currently, so I can see our family fitting this pattern. A huge saving!
One of the battery links is broken, but you can still get to the page through the left-hand menu. It doesn't list the £45/month lower price on that page, but it does mention further offers are available by talking to your dealer.