Cracked mortar, loose brick

[jojomofoho]

Wondering if I could get people's opinions on my porch brickwork. The past 6 months or so I've noticed these cracks in my mortar on my porch and the bricks are lose. Only at the top of the porch. The porch is around 5 years old, double skinned. There are no cracks inside the porch. The skirting is ok. Just wondering if it's dodgy mortar or something more sinister. The pitch roof was removed from the porch last autumn and replaced with a flat roof due to having a garage conversion. It wasn't long after that I noticed the cracks

 

[Mrs Ten Names]

They're not going anywhere. I wouldn't worry.

 

[jojomofoho]

I

 

[jojomofoho]

They're not going anywhere. I wouldn't worry.

I was worried about subsidence?

 

[Mrs Ten Names]

I was worried about subsidence?

Then you'd be looking at a stepped crack over many courses.