Websites change to small screen

It sounds like your iPad may be stuck in portrait mode. Check the Rotation Lock in the Control Centre. Swipe down from the top-right corner of your screen and tap the padlock icon (surrounded by a circular arrow) to ensure it is turned off.

If you have an older iPad with a side switch above the volume buttons go to Settings - General and under Use Side Switch check if it’s set to Rotation Lock or Mute.

I've just looked as it's been a while. The website is different but absolutely fine on my Android tablet in both portrait and landscape views.

Me too. Dunelm same full screen on my iPad.

I've just had look at Dunelm on my ipad gransruleok its as its always been clear and navigable nothing has changed for me.