Please pray for safety for him - this is the first year he has gone without any other members of the family being there. I know he will be OK, after all the other kids are mostly on their own, just I have always been used to older kids keeping an eye!
Also they are going to be located at the 23rd mile mark which means it will be a long day - he has to be at meeting point at 6.15am - dh is going to take him, that is not in London, but at the superintendents house in our town. They have a minibus to take them to London and to their position. They will not be released until most of the runners have passed them - which could be quite late in the afternoon for the stragglers to get that far.
Thanks for prayers.
Privileges granted by men may be denied by men. Rights are granted by God, and can be legitimately denied by no man. (John Bunyan 1660)