UK/Irish ladies; best maternity tights?

Hey ladies, I used to get all my pre pregnancy tights in M&S but they are v disappointing for maternity, only seem to have 1 pair in the whole range and they are 40 denier (I love mine proper dark black). I bought some pairs in H&M where I've got some great cheap maternity clothes but the seams are cutting into me in the most uncomfortable of places. Anyone any tips? I split my time between Dublin and Belfast hence linking in both. I'm having my baby in Holles st so 👋🏻 to anyone else going there too.