Here is the plan for the kitchen (further details in earlier post below).
I made a paper cut-out of the shape of the space under the stairs, and used this to cut the wood to fit.
And finally, the wood taped up to check that it will fit. They will be fitted properly.
I used a diamond file to remove the heart shape in these chairs, which wasn't very Victorian! The chairs and table were a bargain at under £5 for the set but they do need a bit of work to fit in.