I've been widening the kitchen floor area toady, not much to look at or photograph unfortunately.

Stay with me on this description, it's wordy...
The areas either side of the gangway in the kitchen 'zone' were 600mm deep, adding the slope of the walls, it meant that the worktop (also 600mm deep) , when placed, would not overhang the floor as is normal (you know, in the kitchen you can get your feet under the worktop a small amount).
To get around this I've made the floor bigger by 5 inches (2.5in either side, sorry to mix imperial and metric). This will allow for a 10mm or so overhang, all that's left is to get a bigger bit of flooring and to cut down the floor of the cupboard bases to fit.