But yes, I was thinking of that ('entrepreneur's relief' I believe) too - it solves this problem nicely: don't worry about it until you know you're making money.
(And also other problems like 'hang on I sold some old crap on eBay.. was that income')
Ha! I'm old enough that 2017, when the "trading allowance" was introduced, feels like a year or two ago.. :-|
(Entrepreneurs' Relief was a thing that let you get reduced capital gains of 10% on up to £10m of proceeds from selling certain types of shareholdings or assets of a personal business. It's now called Business Asset Disposal Relief and has been decimated to just £1m.)
