Usually the Daily Fail has a who's who pic in one of their articles, but I didn't see it this time.
I'll give it a try.
This is the only pic of the whole balcony I've seen so far.
Balcony
From L to R:
Richard, the Duke of Gloucester; Brigitte, the Duchess of Gloucester; Claire, the Countess of Ulster; Rose Gilman, the youngest daughter of the Gloucesters; George Gilman; Xan, Lord Culloden, son of Alexander, the Earl of Ulster; Autumn Phillips; Mike Tindall; Zara Tindall; the Princess Royal; Albert, son of Lord Nicholas Windsor; Camilla; Charles; the four Cambridges; a piece of Harry's head behind his brother's; the Queen; Prince Philip; Peter Philips; the Countess of Wessex; Princess Beatrice's hat behind her aunt; the Duke of York; James and Louise Mounbatten-Windsor; Princess Eugenie; Lady Helen Taylor and her two daughters, Eloise and Estella; I'm not sure, maybe Paola, the wife of Lord Nicholas Windsor; the Duke of Kent; Lord Nicholas Windsor; Princess Alexandra; George, the Earl of St Andrews; Zenouska Mowatt, granddaughter of Alexandra; no idea; no idea; Sophie, wife of Lord Frederick Windsor; Lady Gabriella Windsor; Prince and Princess Michael.
I think the Chattos were there too, but they don't appear in this photo. I remember seeing their eldest son standing near Mike.
Also, the Linleys didn't attend Trooping the colour, just like Lord Nicholas' children and Lady Davina Lewis and her husband Gary. They were all at the National Thanskgiving Service thought.
The Duchess of Kent didn't attend any of the events. I hope she's ok as she usually attends these family gatherings.