Was able to book The Midland in Manchester for July using the offer, not sure if there’s limited rooms available elsewhere? This is a slightly different offer, only valid until midnight tonight, (Sunday 29th April), but might work? https://www.qhotels.co.uk/offers/offer/?offerUrlName=/leisure-offers/40offsale/
Not working for me either...code not valid at that liason
Couldn't find any hotels accepting the offer...
Lets you select Slaley Hall then when you go through the process tells you that it can't be used at this location.