Ok steady on... the non-DIYers are back 
Our lovely front wall has cracked unfortunately after about a year, well one of the columns has. FYI the top bracket for the railings is embedded into the second row of bricks, so as you look at the top picture the uppermost-left brick actually comes right off now. But the 3 bricks on the right although clearly detached, can't go anywhere because of the railing bracket.
What would you do? A bit of masonry glue?
You can actually see daylight through it at the right angle and so it doesn't look great...

Our lovely front wall has cracked unfortunately after about a year, well one of the columns has. FYI the top bracket for the railings is embedded into the second row of bricks, so as you look at the top picture the uppermost-left brick actually comes right off now. But the 3 bricks on the right although clearly detached, can't go anywhere because of the railing bracket.
What would you do? A bit of masonry glue?
You can actually see daylight through it at the right angle and so it doesn't look great...
The railing is locked in pretty snugly, a bit like