It is possible to download the volume as a pdf file from the links provided. I was very pleased to see the following comment on the page:
"After much discussion, we are now able to accept orders for hard copies £30, but please note there is a minimum number of orders we must receive before it can be sent to print."
Mine was delivered this morning.
And I collected mine from the Post Office on Tuesday. The volume is excellent value for money, despite a few mis-prints. From the on-line text I was able to advise of some errors in the Harrow data before the GLA went to print; unfortunately I didn't spot that David's ward of Westbourne is accidentally confused with West End ward on the Westminster borough map.