Sexual Health Services For Young People. Did you know that Chlamydia is the most common sexually transmitted infection in the United Kingdom? It also often has no symptoms and so you may not know if you have got it. That's why it's Best2know  all about it. Best2Know is all about helping you understand the risks of having Chlamydia and how easy it is to get tested to find out if you have got it. It is very easy to get tested to find out if you have Chlamydia (or to be reassured you haven't) - visit the get tested area while you are here to find out more. You can order a free Chlamydia test kit online or find details of places you can visit to get tested.  This website contains other stuff too - it's not just about chlamydia. Have a look around, you might find out something you didn't already know.  Remember: Using condoms protects you from Chlamydia, other infections and unplanned pregnancy.