I just queried with HR Blackfriars, and got this response -- sharing only what is relevant.
*"Unfortunately, we've had some delays as we are ensuring the hotel is up to Hyatt standard, therefore we are unable to confirm our availability on the requested date."
*"We do hope to open soon, but again are unable to confirm any dates at the current time."

I am keen for HR Blackfriars given the mixed reviews of the ex-CP near Vauxhall