I am on Octopus Agile so this may help.
February average cost 11.12p kWh charging the PHEV 516 miles 161.6 kWh 2.7p per mile
March average cost 8.47p kWh charging the PHEV 338 miles 115.10 3.5p per mile
The downside of Agile peak rate 16.00 -19.00.
The standard tariff I believe is 24p kWh Octopus Tracker today is 16.47p kWh, it fluctuates Dailey following the market cost like Agile however it consistently being than the standard tariff.
Unfortunately I have suffered a brain injury and occasionally I get confused and often say the wrong thing.