Stayed here after the conversion to Delta: the refurbished rooms were great, and although the location is a bit awkward (especially without a car) it was a good stay for us as we had a wedding nearby. I thought breakfast was especially good, above other similar Delta/Marriott hotels I've stayed in the UK.
Unfortunately this hotel is now no longer bookable or listed on the Marriott website as it is used for temporary housing for asylum seekers.