thermal cracks

Looking for some advice if possible. We've noticed a few cracks (photos attached) on the external walls of our property and would like to get others' opinions. We are located in Essex, where most homes are built on clay. The site was previously scrubland, so we believe our house and others in...

Hi all, Before contacting a structutral engineer, I thought it best to ask for advice from this forum. I've noticed this external crack on our external garage (it might have been there for ages, though!). Googling it points towards possible subsidence with it being stepped, though I'd...