True, but only if it is optional. So must be in VMC conditions
Not so.
Can you give any examples?
Flying an aircraft at greater than 150 KIAS in a visibility of 3 km in class G
Flying an aircraft within 1000 ft of a cloud layer while above 3000 ft amsl in class G
Both are technically IMC, require compliance with the Instrument Flight Rules, but both are permitted to a UK PPL without an instrument qualification.