Well, I think this is ironic these figures are coming from UNITE given their accommodation is pretty shoddy (flat pack bedroom, paper-thin walls, anyone?) and super-over-priced.
Given that college subsidise those members of Imperial who reside in Orient House or Piccadilly Court (both UNITE owned housing), we get a pretty good deal out of it. However, these people still pay nearly as much as for a single room in Beit.
I would hate to be the student who didn't catch the Imperial subsidy and had to pay in the region of 160-GBP a week to live in one of their boxes. There is accommodation of better quality to be found much closer to college for that price.
I lived in Orient last year. Aside from the fact i would prefer the 'corridor' layout of Beit to the 'Flat' layout of Orient, it wasn't that bad. We had more space in our rooms, a sitting room, a well equipped kitchen with ten times as much storage as Beit, a TV licence paid for, a double bed, a modern ensuite bathroom (although mine was plumbed back to front- haha!). I prefer beit for its character and friendliness but the quality of the accomodation at Orient (despite looking like a IKEA show room) is not to be underestimated. Sure a few things fell apart (our dvd player, lamp and kitchen sink) but they got fixed very quickly.
As I understood it, the subsidy for Orient and Piccadilly is more to do with the fact they are so far away and so students had to pay for travel in addition (which most other fresher's don't unless they are lazy).
UNITE has a reputation for being shockingly bad, which I wouldn't necessarily disagree with. However, my personal dissatisfaction with Halls was certianly not down to the accomodation provided. More to do with the spirit of the people there.