I've just bought the Clinique Black honey gift set with the "almost" lipstick and mascara from Beauty Box for DD and DS' girlfriend who are both 21. I have shared a referral code to get a £10 off first order on referrals board. It's big on tik tok and Instagram with all the young folk!! I got it for £18 with a 20% off code but it's £20 on the site. Free delivery when you spend £25. I checked with the 20 somethings at work and they were all raving about it. The lil thing blends to your own colour and enhances it or something so good for everyone!
Apart from that both girls are students and also enjoy getting perfume (Armani diamonds is £31 down from £62 on Debenhams blue sale), lovely notebooks from Papier (see the referrals thread), vouchers for Nando's, Costa, Starbucks, Greggs, cinema etc.
For 50 something female, that's me! I'd love the almond oil shower gel from l'occitane, perfume (even a small bottle of something nice for everyday), lovely candle/ diffuser from Valentte, nice small crossbody bag that fits phone and passport for travel, lovely bottle of wine with fancy nutty chocolates and a book! If she likes the cosiness of autumn and winter have a look at getting her the Nigel Slater Chronicles of Christmas. It's such a lovely book to help countdown to Christmas. You could gift it with some cosy socks and a bottle of red wine.