It does not look well to me.They do best in acidic soil.Not sure there is much you can do.
Some shade, acidic soil (ericaceous) and rainwater only. It might recover if you do those things. That is assuming it's in multipurpose compost at the moment.
I had one that looked not much better after it got dried out this spring, when I literally had no water to spare for anything but essentials (no mains water). I repotted it in fresh compost, cut it back to healthy looking buds on each branch, watered it well and put it in the shade. It has made new growth all over and is looking good to go, so I shall find a spot for it in my woodland area and plant it out in the autumn. Good Luck with yours
Yes in multi purpose compost atm. I’ll add some acidity to the compost and use rainwater. Hopefully it’ll eventually spring back to life. I only brought it yday for £1 hoping it’ll bounce back.not sure what you mean by 'add some acidity' but you will need to change all the soil for ericaceous compost. I would even rinse off the old compost.