Use a pointed tool to scrape out the grout surrounding the damaged tile.
Starting at the centre of the tile use a hammer and chisel to chip out the
tile slowly and carefully.
By taking care and working slowly, the surrounding
tiles should remain securely fixed. Once removed, scrape out the old adhesive
and use a damp cloth to clear away any debris.
Use a layer of adhesive on the
back of the tile and press into the desired position. Grout around the tile
when the tile adhesive has set - see Grouting for further details.
If the grout becomes discoloured after time, you can either colour the grout
by using a brush on colorant stick (available in a choice of colours, including
white) or re-grout the wall.