Best opaques from the High St?

[Horsemad]

I am looking for black opaque tights - can get to M&S, Next, Peacocks, Dorothy Perkins, Boots, Tesco, Asda. Oh, and an independent department store that sells high end stuff! 😊

Any recs please?

I went with M&S in the end, they were great and not too expensive, so a good result!