Linda, who’s sitting barefoot in the attic room of their Sussex farmhouse home, is constantly surprised by the joy Paul brings to her life. ‘I know we’re coming up to our 30th wedding anniversary next year, but some days it feels like we’ve just got together. And I love that. I love it when there’s a power cut, no light, no heat and I’m having to cook over an open fire while Paul serenades me on his guitar. I love that simple life. Now that the kids have flown the nest, it’s meant that Paul and I have become like boyfriend and girlfriend again, doing those little things together that you do when you’re first dating … going to the theatre or just walking hand in hand through the fields. How many married couples of 30 years’ standing do you know who wander about holding hands? In some ways, we haven’t grown up. I guess it must be love!’ Linda says their relationship has always been like that. ‘When Paul was knighted, he said it was great because it meant he got to make his girlfriend a lady. But nobody calls me Lady Linda or Lady McCartney. I’m still just Linda and he’s Paul. Sure, it’s a real honour for Paul and I’m proud of him, but it doesn’t seem real that my boyfriend’s a knight - although he’s always been a hero.’