Battersea Power Station and affordable homes - the plot thickens

They're talking about a "poor door" for the redeveloped Battersea Power Station's many apartments, as affordable housing is moved away from the main site and across Nine Elms Lane.  More like a "slightly less well-off door" I'd suggest.

Interesting development picked up by the Standard and further reported on City Metric website, suggesting that the original plans to mix "affordable" with premium housing in the Power Station redevelopment have been none too subtly altered.

It seems the affordable stuff will now be over the road, away from the river and the glam new buildings around the shell of the Giles Gilbert Scott building itself.

Well, there's a surprise then.

The developers, Battersea Power Station Development Company (BPSDC), and council point out that this is all well within planning laws - but why, in that case, did they not simply plan it this way in the first place?