Thanks PB1975, that is most useful and educating. There is obviously a trade off when sites are v3 rather than v2, and particularly where they change with an upgrade from 2 to 3. This distorts the appearance (- not that I am criticising your work!) in that 6 v3 can do the work of 12 v2 if they are all occupied. There are some sites that have regular queues that presumably will be prioritised for upgrading.
Whether they get done because of power/planning etc is another thing. Certainly the considerable increase in M3/MY owners in this and next year (me included) will want to enjoy the benefits of a reliable as well as expanded network.
My data point is that I regularly stay at Scotch Corner hotel. Over the years I have always seen plenty of availability at the chargers there, and spoken to the car owners to get a feel for the Tesla experience. When I got my M3 in September I had already noticed the increased use there and I am part of that increased fleet of M3's, although as a resident I can avoid "rush hour". Queues are now regular at peak periods. There are going to be many more Teslas by this time next year on the UK roads. The v3 bases have been sitting there for some months so somebody is working on it, albeit slowly! If the same problem exists elsewhere in the UK in the same way I fear for a crunch in a year's time.