Keyed cavity wall - replacing blocks

[Pompeyandy]

Hi,

Have removed a wall that formed an internal larder (non-load bearing) and in the process some breeze blocks keyed into the cavity wall of the house have fallen out (around the window frame.)

What is the best way to replace these? And could this cause any further issues?

Cheers.....

 

[PrenticeBoyofDerry]

This should help
http://www.ehow.com/how_2092479_replace-bricks-blocks.html