Reception desk could not have been more helpful in finding a better room (more light, seating, and a bath) within the same category (when I pointed out that our room was a let down compared to the, ahem....aspirational photos shown on Hotels.com).
Only slightly bad taste left in the mouth was from Breakfast. Unless you really can't be bothered to leave the hotel, go out! Pain au chocolate, bowl of bircher muesli, 4 coffees, one terrible quality vegetarian 'full english' thing, plus service, £77! Coffee was Costa-level, no better, Veggie thing awful. Go to Delauney a hop, skip and jump up the road.
Noticed a clank or two from the plumbing (as another reviewer wrote somewhere), but it seemed to be from our room when we were using the taps - ie manageable, albeit perhaps not ideal given 5*/cost etc. But not a big deal for us.