Shouldn't need a code if you use this link. https://www.ihg.com/content/gb/en/deals/partner-offers/principal-offer?promoCode=17779&offerId=UK010
Asking for a promotion code to register
What’s the promotion code to register
Met Leeds is as low as £28 per night some Sundays in Jan and Feb if you use the Avis partner preferred rates (Google it) and can book 21 days in advance. It can be worth two nights at this price to use the free night in a much more expensive property later in the year.
It's an excellent deal if you want to stay in these hotels. They are very upmarket IHG hotels, and some of these hotels have (in my opinion) extortionately high daily room rates. But if you choose to go there anyway, it's a good deal. And you'll have a lovely stay :)