The Brockley X Files
This explains a lot...
The South London Press reports that UFOs were witnessed flying over Brockley Station in the mid-1980s, their superior technology allowing them to predict the rise of Brockley, long before Phil and Kirsty woke up to the charms of SE4.
It is not clear whether these blobs were working class or middle class but it seems likely that they were childless, due to the amount of travelling required for their work.
Thanks to Patrick for beaming this to us.