To me looks like nutrient deficiency . Maybe try giving it a teaspoon of chelated iron and epsom salts in a gallon of water ? Or some liquid fertilizer like fish emulsion or Miracle Grow .

Thank you, Pink Rose. I'll try that first.

@BoweredCottage

I also think some good soil and iron may help. I also would like to encourage you to grow it and dont worry too much about mosaic virus. Many people here have plants that are MANY years old and still perform great while infected with MRV. Several of my roses have it and I do not do anything different with them.

If the plant dies David Austin should replace it for you.

This looks like iron deficiency to me as well. I’ve had this with a few of my potted roses over the years, two were due to poor draining pots/soil, one was for reasons that remain obscure. All were already being fertilized with liquid fish fertilizer. In every case they got better with refreshed potting soil in a well draining pot and a few doses of liquid iron.

Thank you Dianela and Heather. I’ll repot her in some fluffy soil and hope for the best. I appreciate your help!