Upney kitchens
The kitchens we meet in Upney
You can plan splashback and upstand work in Upney from a floor plan, but the plan and the room have a habit of disagreeing once the tape comes out. Inter-war semis and terraces on the edge of the Becontree layout, where kitchens are small but the plots are deep enough for a shallow rear extension, and most jobs end with an L-shape of about 3m by 1.8m plus a utility by the back door. Units are commonly replaced at the same time as the tops because the originals are past saving. The drawing we work from is agreed with you first, so no one in Upney finds out on fitting day that something was assumed.
The extension slab was poured to its own level, so there is a lip or a ramp where the new floor meets the original one. A wall out by a few millimetres over a metre will show behind a full-height panel and disappear behind an upstand. A chimney breast breaks a panel run regardless of the drawing.
These went up as handed pairs, so in one house of the two the kitchen sits against the party wall and in the other it takes the alley side, and only one of them has an outside wall to work with. These kitchens are nearly always retiled at least twice, and stripping the old tiles takes the bottom course of plaster with it because the original laminate top ran underneath the tiles rather than up to them. A bowed wall is what decides between an upstand and a panel.
Locally the mix runs to 1930s semi, inter-war terrace and post-war infill. Each of those behaves differently once the old top comes off.