Wantage Neil

Hi, looking for advice on locating e-bike friendly cafes that will let me get a bit of charge over lunchtime on a long ride. I'm brand new to the forum but an e-biker for over 5 years. I'm planning a "coast to coast" (Pembroke to Lowestoft 750km) over a couple of weeks in late May-June. I have a Moustache Samedi with the Bosch Performance Line CX with a Powertube 625 battery. Some of the sections are quite long, up to 95 km and 600m ascent in a day. That might take me close to full battery draining. I can always recharge overnight at that night's hotel but would like to identify cafes (chains or individual) that will let me charge up over lunchtime (while eating/drinking there). Are there any decent online lists or resources? I aim to do most of the journey in Eco mode (lowest support mode) with some Tour on hills (and a little MTB level if needed on the steepest bits!). I am applying a rough rule of thumb that uses 4km of range for every 100 m ascent. Most recently, I did 80km with ~700m ascent and I had over 30% left but I'd prefer not to dip into <10% land (maybe a bit cautious). Can you help? If needed, I can ping a list of towns wher I expect to be each lunchtime. Map is attached Thanks!