Another was advised not to make 'the silly mistake of not picking up' a particular investment.
Times, Sunday Times
Then we made a silly mistake after we didn't capitalise on our chances.
The Sun
I made a silly mistake and it's difficult to explain what happened.
The Sun
Only a silly mistake caught him out when it did.
Times, Sunday Times
For a player of his quality, it was a silly mistake to make.
The Sun