Yes it is happening in Dulwich Village, at the Christ's Chapel. Alleyn's and DC CCFs will be there in numbers (especially Alleyn's). Probably best to be in position outside the chapel by about 1020. Or you could watch them arrive by standing in College Road, and then move inside the grounds. The service is short, and all outside. Probably best to avoid Calton Avenue, the village and College Road that morning as the traffic will be seriously held up as the cadets march there and back.