"I am writing to say that, following your recent letter, His Royal Highness The Prince of Wales has asked me to write and offer his warmest congratulations for the extraordinary feat that Rosie Swale Pope is undertaking.

He did just want to convey his very best wishes to Rosie for the successful completion of her remarkable expedition.  It is indeed a marvellous and inspiring exercise and no doubt the organisations that will benefit from Rosie's efforts and determination will be immensely grateful.