Just wondering what the general rule is when kids start secondary school. Are they expected to travel there and back alone, aged 11? We are in London so would involve either a tube or bus journey. Just seems a lot for an 11 year old and wondering how I would get both my sons to school when one is at primary and one at secondary. Or are they sufficiently mature by 11 to go alone? DS is currently 8 so hard to imagine what he will be liked in 3 years.