If you’re after maternity tights!!
I bought some maternity tights from Next for £8 and they’re so lovely! Super comfy, perfect thickness for this weather (I got 60 denier but they also have 100 and 200)
Not sure if they’ll fit till the very end but I was desperate for something comfy to wear now, and they’ll definitely fit for a while.
I’m size 12-14 and got size large.
https://www.next.co.uk/style/st109370/439349#439349
I also bought some high wasted ribbed leggings from Next which are really comfy too. They were recommended by someone on this forum and so I ordered some and they’re great. https://www.next.co.uk/style/su152906/u65489