Thanks for all the feedback. I'm hoping to see the Chambers Club when we stay in November (Titanium). We've decided to spend an extra day up north before catching our Eurostar so I made an interesting discovery when changing my booking (which some here may already be aware of). Originally had 2 nights booked at Senior rate and no application of SNA's was possible, however I dropped to one night on points and voila - a Superior room can now be upgraded to "Premier King Bedroom Larger Guest room, 1 King, Barlow Wing". Not a suite, but certainly an improvement.