Organisation.find_by_slug('the-prime-ministers-office-number-10').update_attribute(:slug, 'prime-ministers-office-10-downing-street')
Organisation.find_by_slug('the-deputy-prime-ministers-office').update_attribute(:slug, 'deputy-prime-ministers-office')

Move the slugs for No10 and DPMO
Move the slugs for No10 and DPMO

Separate Puppet pull request to come with redirection. This needs to be
released first.

https://www.pivotaltracker.com/story/show/47364021
