Sales of plug-in hybrids and battery electric cars in the UK inched up to 7 percent of total sales in the first quarter of the year, Reuters’ John Kemp wrote this week. That’s up from just 2 percent for the first quarters of both last year and 2018. The increase may not be particularly impressive as a portion of total car sales, but it may be meaningful for the shift from internal combustion engine cars to battery EVs. Last month, The Telegraph reported that the government was mulling over a so-called car scrappage…