Is There a CGT on Those Shares?

There's no tax when you're granted them because you haven't got them yet. It's an award which will vest at a future date. When they vest, the value is treated as income in that year and tax according to it. So if they've gone from 10 to 20, is no CGT? No. Because you get them at 20, essentially. But if you hold onto them and sell later down the line and there's a gain, then yes, they may potentially be CGT between vest date and sell date.