Get there via First Great Western train from Paddington, 30 minutes, from return. Have a bite at Limes Bakery - great for sandwiches and sweets. An adorable place for lunch and a stroll.
A perfect day trip from London: Things to do in Windsor (including a visit to Windsor Castle)
Interior photo of Wiindsor Castle Helsted Helsted Couwenbergh
Tips for Visiting Windsor Castle, London Day Trips