@henrypeter
This machine was based on the WM31/WM34, same layout of buttons, same layout of programmes. (just rinse hold instead of slow spin, and half load instead of super rinse).
The WM6* machines had different dials, different programming (ever so slightly), and the buttons in a different position.
Hotpoint built the machines,as you say, they then sold it on to the company either Creda, or Electra(?) and then they added the door, control panel.
Under the control panel, the layout of buttons and times etc, is exactly the same as the WM1*, WM2*, WM3* machines etc.
This Electra has the 1200 section on the dial, which means it is laid out as the WM31, WM34 machines.