William & George cheer on beloved Aston Villa in pair’s first public outing since mum Kate shared her cancer diagnosis

While he might not have been present during Kate's courageous video address on Friday — make no mistake, he has been by her side every step of the way.

William has stepped up with school run duties and provided a "great source of comfort and reassurance" to his wife.

But he has also been a comforting and reassuring presence for the public.

From leading members of the Royal Family at the Commonwealth Day Service to enjoying cheerful banter with youngsters on a youth centre visit, he hasn’t put a foot wrong.

Just this week he visited Sheffield to highlight his Homewards project to end homelessness in the UK.

Even then there were few chinks in his facade — but Kate was clearly on his mind.

"She needs to be sat here to hear this," he smiled, when the discussion turned to the challenges of young families.

But ultimately he is only human.

To have your father and your wife diagnosed with cancer within such quick succession is heart-shattering.

It's a remarkable insight into the character of this young man that he has been so incredibly brave.

Theirs is a very private turmoil which has been brought into the public arena by nature of their roles as future King and Queen.

William must feel the weight of enormous responsibility, both personally and for the monarchy, of which he is now the public face.

But he knows his most important role is that of dad and husband.

He will make that his priority.

This is a distinct difference from the ways of the past, where your royal role came before the role of spouse and parent.

Think back to when the Queen was young.

WILLS' PRIORITY

It was a man's world then — and she was forced to abandon her children in a way that William is determined not to.

William and Kate waited until the school term was over and their children were home before making their public announcement.

They needed to be prepared.

In this, they will have had the wholehearted support of Charles — who knows what it feels like to be brought up by nannies.

William was also acutely aware of the lack of his own father's presence in his life, especially when things went wrong.

In 1991, he was accidentally hit over the head with a golf club when he was at school and Diana was having lunch in her favourite restaurant San Lorenzo.

The call came through that William had been bashed on the head and they thought he might die so it was very serious.

Both Charles and Diana rushed down to Ludgrove.

William was taken to the Royal Berkshire Hospital and then to Great Ormond Street Hospital and Diana went with him.

But ever a man of duty, Charles prioritised his engagements.

William is determined to do things differently.