Got back from my Wales trip which put my M3 SR+ to the test, and it was great. Going we charged at Bridgend (Sarn) Supercharger for 18 mins - no longer than it took us to get coffee, snacks, toilet etc - which gave me some safe juice at the destination. Arrived on 39% but then had to fanny about getting food, a replacement invertor for the camp bed etc, none of which was close and another hour of driving in total took us down to 18%.
Charged overnight on a 3-pin plug at the campsite owner's farm as planned, 15h to get back to 80%, was done by the very early hours. Full day out to Tenby, Barafundle Bay etc. Charged in Tenby for a £1.07, and unfortunately the charger at the beach car park - National Trust - was ICE'd, but hardly surprising given people were straddling verges and blocking access left right and centre etc. Didn't matter in any case.
Didn't charge that night and got back to Bridgend on 8%, got up to 63% in 18 minutes - again, just a toilet, coffee and pastry stop. Impromptu stopped at Cardiff for lunch and charged for free at St David's Centre (Tesla Destination) back up to 90% (may as well if it's free!). Got back to Bristol on 65%.
Total of 360 miles for £1.07 which was the brief 8% charge in Tenby.