Birkenstock Madrids - I have about 20 pairs in various colours that I rotate as I virtually live in them from March/April until October
Sainsbury's Tu high waisted skinny jeans in black and dark / light blues. Not fashionable but soft and comfortable and will throw them on with a top for dog walks
M&S multipack knickers - midis, boy shorts and high legs both the cotton and no VPL silkier ones, get black white and nude
Freya bras and matching knickers (various styles) for when I want to wear a nice matching set. I'm a 40DD and curvy bum and their styles / sizing is good on me (like their bikinis too and always try to stock up in sales)
Yes to what PPs have said about New Look - some little gems amongst the poorly designed and made polyester tat. Always find at least 2 nice cotton casual summer dresses in there. Ditto peacocks - their basics range of cotton vests is great value, though they are quite thin (I like that they are thin though and go for the darker colours)
Bamboo socks from BAM Bamboo Clothing - both everyday ankle sock and the hiking socks. Have gradually replaced all my socks with these and love them, well worth the money. Even the lighter pairs have reinforced toes so last really well. I love the stripy / colourful ones
Fabletics Powerhold leggings - do exactly as they say and hold everything in and I have pairs that I've washed and worn for a few years now. Very good quality but I'm aware it's a subscription service so you have to remember to cancel once you've got the offer you want.