No accessible guestrooms at Sheraton Park Lane Hotel until end of 2016

I have been contacting hotels in London as I am looking into making a booking for later this year and one requirement is that one room has to be an accessible room. I am looking into 4 star plus hotels that are in Central London and one of the hotels that I had sent an enquiry to was the Sheraton Park Lane.  They replied quite quickly to tell me that they currently have no accessible rooms until late 2016 due to ongoing hotel renovations and suggested I stayed at one of their sister properties.  

Before I donned my campaigner hat I thought I would send another email to see if this information was correct and to see if they could give me further insight into the when these renovations will be complete and when bookings can be accepted for the accessible rooms.  I have had a reply to my email to confirm that there are no accessible rooms available until the end of 2016 but didn't mention when reservations could be taken from either.  Once the renovations have been completed accessible rooms will be available as a king size bed or twin bed configuration and that they will be wet room only.  I have sent another message to ask if accessible rooms are available in all grades and if not will there be a separate seating area

Like a lot of hotels the Sheraton Park Lane does not give any information out about its accessible rooms or facilities on their official website and no photographs in their gallery.  The website also omits to say that they are undergoing ongoing renovations.  Maybe if they mentioned the renovations no one would want to stay with them. I get so frustrated with hotels who do not show accessible information on their website or have such small  links that they are easily missed.  It sometimes feels as if hotels would rather not have disabled guests, that may seem an odd thing to say but there are not many (hotel chains) that openly promote disabled facilities at their hotels. 
Update - I have just received another email from the Sheraton Park Lane to say that they do not have any accurate information to which room types will be suitable for wheelchair access or how many of them they will have.  They are confident that they will have all the information available on their website shortly before the renovation is complete.  Not sure I believe this so we will have to wait and see but I won't hold my breathe.