Biddenden Circular via Cranbrook and Sissinghurst Castle

Walk starts at the Three Chimneys in Biddenden, going North West up towards Frittenden, looping around towards Cranbook Common, and back to start point via Sissinghurst Castle. Ive booked 6 places for lunch at 2:30pm, but please can you contact me in advance if you would like a place, so I can work out whether we need to change the numbers?