Pretty odd lettering in terms of coaches.
It's a bit strange how it goes coaches A, B, C, D then K, followed by L, M, N, P and bounces back to J. I thought they would've kept the lettering similar to the 221s (A, B, C, D, E, G, H, J, K, L).
It tells me I am unable to reserve a seat in Coaches C and N, but half the coach is reserved while half isn't, but Coaches D and P have the same thing. It's a bit confusing because where it changes over to reserved seating, half of a table of four is unreserved.