They're not alone in that: for instance, .eu and .be domains with registrant contacts without an organisation name set have only very minimal details published in WHOIS.
Then again, it's totally up to ccTLD operators to decide on what details are published in WHOIS. gTLDs (those longer then two letters long) have to stick to ICANN's policies.
In the UK whois privacy is only for non-trading individuals (i.e. for personal Web sites) and always has been I think.