Found 5th Aug 2017
Was looking for cheap hotel in central London for November. Noticed new premier Inn opening at Westminster abbey which has rooms for £40.50 for Fri night (Nov 3rd). Had a check and seems to be prices from Oct (assume this is when opens) from ~£40 or ~£65 for sat night. No reviews obviously but one at Westminster St James nearby scores well. Seems like a good cheap no frills central London option. Hope this helps someone!