I'm in the process of replacing an about 20 year old Magnet softwood
window which was rotten with a UPV one from Screwfix. I didn't measure the
old one carefully, assuming they were standard sizes, and how wrong can
you be...
The new one, the only one they do close to the original in size, is about
75mm too short in height. Not enough of a gap for a full brick, though.

Seems strange to me - I'd have thought since the majority of sales would
be for replacements in houses with non metric bricks, they'd be sized to
an equal number of courses.

So, what's the easiest way to make up the gap underneath? Cutting bricks
in half or thereabouts height wise sounds rather skilled for me, unless my
tile cutter would do this in a couple of passes. Use creasing tiles? Or
can you buy bricks to match London stocks that would do the job?

Any suggestions gratefully received...

--
*Why isn't 11 pronounced onety one? *

Dave Plowman London SW 12
RIP Acorn