Insulating round the windows

To minimise cold bridging, the windows sit forward of the brickwork, in line with the first layer of insulation.
(These are EcoPassiv windows with an insulated wooden frame.)

Then the second layer of insulation overlaps the front of the window frame.

It's easy to do (if the insulation thickness matches the position of the window), effective, and makes a nice size window reveal.

One thing to keep in mind - inward opening windows like these go well with external insulation. The typical UK outward opening window could be restricted by insulation like this in some circumstances.