As far as I know, there is no such online directory for the UK. If you know the person's name, and address, then you can look up the phone number online, but you cannot find a person's address by name alone.
If it is possible somewhere, then it's likely illegal.
I've not seen a 'white pages' or phone book for more years than i can remember, and I've only been listed in them once, when you could apply your details via the web, so I listed myself as "Lord Jones" instead of "Mr. Jones"
I used my real name tho, rather than Jones, else it wouldnt have been funny.
But I digress.....