Prince William has admitted his mum Princess Diana would be feeling really "disappointed" with the state of homelessness in the UK.The Prince of Wales, 40, has said he feels “glad” his mother introduced him to the cause from a young age, as he reflected on his childhood while recording a podcast with two people with firsthand experience of the issue.The royal said he thought his late mum would be “disappointed” more progress had not been made in tackling the problem during the intervening years.The Royal features in a video appeal recorded for this year’s Red Nose Day in which he meets people receiving help from charities supported by Comic Relief. “My mother introduced me to the cause of homelessness from quite a young age, and I’m really glad she did," he explained in the film.