sex education for 5 year olds?

Hello, my son has recently started reception in London. What I need to know is when these plans for "relationship lessons" for 5 year olds are expected to comence. I would definately like to take my son out of such lessons as I believe he is still too young to be shown graphic pictures of the differences between male and female bits and I would prefer to teach him about healthy relationships myself. I dont need the state to educate my child about such personal matters, I can do it myself. Thank you for your help.

FIVE ! Welcome to the world of liberals running the education system. Here in the US we are experiencing the same thing. I just want to scream out "Let them be kids!" Teach the basics!