Why does number of turnovers conceded not match opposition turnovers won?

I've just been looking at some of the breakdown numbers from the Scotland v England match yesterday.

The official match stats show that England conceded 15 turnovers but they also show that Scotland won 10 turnovers.

Why is Scotland's number of turnovers won less than England's number of turnovers conceded? Can anyone explain to me what these numbers include please? I'm guessing possession lost by handling errors not at the breakdown must be a factor?

Thanks.

knock ons are turnovers but are not won. Same as mauls that end up with a turnover I think

so Scotland won 10 turnovers at the breakdown plus England gave them the ball 5 times from knock ons or maul turnovers?

A few lingering nematodes got five.