Three questions. The two diagrams show exactly what to measure and what to look for, so you can check your own door in a couple of minutes.
Pick the closest match. This tells us which fixings to send with your lock.
The lock body needs a pocket this size cut into the edge of the door.
Your door from the front. We’ve cut it along the blue line and looked straight down.
Edge width. Open the door and measure straight across the flat edge where the latch sits. On most doors this is the same as the door's thickness.
Depth. From that same edge, measure straight back into the door, across the face, away from the gap. You need 68 mm of solid material for the lock case to sit in.
If both measurements are 22 mm and 68 mm or larger, answer Yes.
You're looking for two metal plates already set into the woodwork — one on the door edge, one on the frame.
The two blue marks are the plates you’re looking for, facing each other at handle height.
On the door edge: a flat metal plate, roughly 240 mm long and 22 mm wide, held on by two screws. That's the forend.
On the frame, directly opposite: a matching plate with one or two rectangular holes cut through it, and a pocket behind. That's the strike plate.
If the door edge and frame are bare, with no plates and no recesses cut for them, answer No.
Lock body: 240 × 22 mm forend, 68 mm case depth, 40 mm backset, 85 mm centres.