The Guardian today enthuses:

The UK’s electricity system recorded its “greenest” ever month in May after running without coal-fired electricity for a full calendar month. The National Grid, the energy system operator, said the country’s sunniest spring on record helped generate enough solar power to reduce the carbon intensity of the grid to its lowest level ever recorded. The bright and breezy weather helped wind and solar power make up about 28% of Britain’s electricity last month, narrowly behind gas-fired power generation, which made up 30% of the energy mix. 

The report doesn’t mention Scotland. Why should it mention Scotland? Just this:

In Energy Voice on 28 January 2020:

‘Mammoth Highland offshore wind farms are footing a bill of around £20 million more per year than English projects to connect to the grid, according to the builder of what will be Scotland’s biggest wind venture. The levied regime in the UK, called transmission charging and set up by the energy regulator Ofgem, is understood to be a major disadvantage to projects in the windiest regions of Scotland – with a £20m per year price tag that could rise to £30m by 2025’

Not only is Scotland paying extra to connect to the grid, but the electricity is then being transferred to England, Wales and Northern Ireland to compensate for their lack of generation and to help the UK appear to be meeting its carbon reduction target. See:

Government figures reveal the massive and increasing level of transfer of electricity from Scotland to England. In 2018 only, the transfer rate increased from 13 512 GWh to nearly 25 000 GWh. 1 GWh would heat 700 000 homes!

https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/766380/ET_5.6.xls

Note that the ratio of transfers from Scotland to England compared with those from England to Scotland is 25 to 1!