Who knows where I can buy some

I was going to suggest fleece-lined leggings, too. I have a pair and they are lovely and warm.

Some places may also sell fleece-lined jeans (denims), although I am not sure what's available in your area.

Primark does fleece lined leggings that you could wear under trousers or with a skirt. They look like thick black tights, are very cosy and don’t cost a lot.

I wear leggings under my trousers and over trousers on top when it's really cold.
I hope you can get cosy. There's nothing worse than being cold.

you can get fleece lined leggings ,they dont look thicker than the ordinary ones and are fine under a long top or dress

I too wear leggings under my trousers. Simples ??

Thanks. I’ll look them up. Brrrrh !

When I'm feeling really cold I wear leggings under my trousers.

I wear ‘Simply Robell’ they sell some which are fleece lined. Easy to wear and wash. They can be an everyday trouser or dressed up for the evening and come in lots of different colours