This is a very interesting ruling.
One wonders if tenants and residents associations are entitled to the info - and if they are entitled to similar info on leaseholders.
On the other hand, don't tenants have control over their info re:giving their permission for its release?
Interestingly (or not), our council used much the same tactic but the anti-transfer people simply looked up old issues of the newsletters to tenants which contained addresses on the prior to paint. refurbishment, etc. programmes, -- thus making the 'right to have to give permission' arguement a spurious one.