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I think the super charger coverage is really poor in the South East, do not even know if there are any plans for them either, cannot believe there are none around Brighton, Gatwick, etc.
Yes, it wasn't until Havant and latterly Liphook that Tesla became a viable option for us to achieve 99.9% EV usage. We spend a lot of time on south coast potentially for several weeks at a time and only access to third party charging. We normally do at least one M27 trip via Portsmouth during that time but would be useful to have one further east too.