Jasmine leaf issue.

Hi all,
my jasmine (I think it's a star) has developed red marks on the leaves over the past few days. It's in a large container that I put it in last year and has been doing well. Ive had it around 5 years. It's flowering at the moment, the soil is moist and its had its usual feed. The only change is where its positioned. Full sun near a brick wall. It's been there for around 6 months. I've had a look on the internet and I'm getting different reasons as to why from fungal infection, stress or some say severe weather changes which we have had recently. I'm reluctant to treat without having some advice. Please see photos.
Thanks in advance.

 

Perhaps a touch of sunburn? But overall it looks healthy enough, and it's new position will certainly ripen the stems and help make it resistant to winter cold.

 

Thank you @noisette47 that makes me feel a little better I did have a second look and it only seems to be on the outer leaves. The inner are perfect fine. I'll keep my eyes on it see how it goes