After six long weeks apart, the Duchess of Cambridge drove to RAF Brize Norton to give Prince William the romantic welcome he would have dreamed of while serving in the Falklands.

If Sonny Bill Williams knocked on my front door, ready to take one of my girls out on a date, I'd happily invite him in.

It only took 20 seconds for the man who made a Valentines Day proposal on a billboard to get his answer.

What makes love a success? We talk to three couples, working in similar fields, to find out the secrets behind their love.