Charlotte, after an afternoon at the swimming pool with her friends, wearing exactly the same swimming costume as her twin sister:

‘We were admiring our swimming costumes in the mirror before we went in, and, oh my goodness Mummy, we looked so alike no-one could have told us apart…..’

Paused for a thoughtful second:

‘It’s a good job I know I’m Charlotte, otherwise I wouldn’t have been able to tell us apart!