Buying a .uk domain and WHOIS Address Opt Out

I've known for some time that domain names you purchase (such as .co.uk) can be protected against identity theft via DomainsByProxy.com, such as those purchased via godaddy.com.

What this means is that a WHOIS lookup on a protected domain returns details along the lines of
    Registrant:
        Name withheld. This Registrant is using a privacy service.

    Registrant's address:
        Address withheld. This Registrant is using a privacy service.

    Privacy service:
        Domains By Proxy, LLC

However, I hadn't realised that .uk domains cannot be protected in this manner as they a governed by different rules.

So, during my recent purchase of a new .co.uk domain, when I was asked if I wanted to purchase the .uk as well, I thought, "Yeah, OK", without realising the differences between these domain extensions and privacy.

After some head-scratching (googling) I found that it was still possible to protect some of the registrants data (address) via an Opt Out. This meant logging into Nominet and requesting the Opt Out for the new domain.