Step 1
Safety is always first, make sure the plug sockets are off before starting to work around them.
Step 2
Measure the distance from the skirting to the bottom of the socket.
Step 3
Lay the MDF over the top of the socket and mark in pencil where the MDF meets each side of the socket.
Step 4
Take the MDF off the wall and lie it flat on the floor with the pencil marks facing up. Then use a straight edge to continue you marks down the panel.
Using the measurement from Step 2, measure up from the bottom on the panel and mark with a pencil. Use a spirit level to draw a straight line across that measurement so you get a H shape.
Step 5
Optional: Use a drill and a large drill bit to drill holes in the corners of the cut out (pink circles on the diagram below). This will help with sawing them out.
Use a hacksaw to cut out the section for the socket.
Step 6
Place your panel on the wall to check the fit. Use sandpaper for small adjustments or the hacksaw for bigger ones until you get a snug fit.
Don't worry about any gaps, you can decorators caulk to fill them as per your kit how to guide to get a straight finish.