So ASA have replied to my complaint. Cut and paste below:
Thank you for contacting us with your concern. The complaints we receive are very important, because they help us to build a picture of the types of issues that affect both consumers and businesses.
Your complaint
I understand that you believe that the Instagram Story and Post by Simon Hooper was an undisclosed marketing communication for CaPietra tiles and Westone Bathrooms.
Our rules
Marketing communications should be obvious when they are engaging with advertising material.
Our decision
In this case, I note that the Influencer has now updated their post to include a ‘#Ad’ identifier at the beginning of the post. However, as we appreciate that this post was originally uploaded without these identifiers, we have been in touch with Mr Hooper and the brands involved to provide them, and remind them, with regard to what we expect of brands and identifiable as such. Consumers should be aware influencers on social media.
Thank you once again for taking the time to raise your concerns with us. Comments such as yours help us to understand the issues that matter to consumers and we will keep a record of your complaint on file for use in future monitoring.