Princess Kate and Prince William declined a castle invitation with Prince George, Princess Charlotte and Prince Louis, it has been claimed. The Princess of Wales was photographed attending church at Crathie Kirk last weekend, amid her holiday on the Balmoral Estate. Kate looked in high spirits as she arrived at church, driven in a classic Land Rover Defender by Prince William. She wore a beige trench coat from Holland Cooper, paired with gold drop earrings and a brown fedora hat from Hicks & Brown. In March, she announced her cancer diagnosis and has been taking time away from most of her offi…