Complex sentence: On 11 March 2014, Prince Harry formally launched the programme in the UK at the Henley River and Rowing Museum, helped by a grant from the Endeavour Fund, part of The Royal Foundation of The Duke and Duchess of Cambridge and Prince Harry.
Split into simpler sentences: On 11 March 2014, Prince Harry formally launched the programme in the UK at the Henley River and Rowing Museum. This was greatly assisted by a grant from the Endeavour Fund, part of The Royal Foundation of The Duke and Duchess of Cambridge and Prince Harry.