Highwalk plinths; many missing tiles

Tiles have dropped off the highwalk plinths for years.  It seems that the technology did not exist to stick them on permanently, but nonetheless someone would come along and stick them back on when they fell off.  But of late when the tiles fall of they are just stacked beside the plinth, leaving the sides of the plinths naked and ugly.

The plinth:  Some day my tiles will come ...