stopping breastfeeding at 12 months

[Brodicea]

For the past few weeks I have been trying to wean baby (12.5 months) off the boob, but while she will take a cup of formula before bed (a habit long established) and a cup from my mum or her dad while I'm away, she is going absolutely bananas to get at my boob when I try to give her a cup any other time of the day.
I have tried giving her a cup, giving her a snack, having a cuddle, distracting her with toys or songs but no she gets really upset and angry, pleading and pleading until I finally cave. She really screams and claws and even ends up yanking my hair and hitting me, or just lies prostrate on the floor with her arms in the air! She gets so worked up that I always cave. Weirdly if I do get her a cup of formula she's excited initially and has a bit - then remembers my boobs and starts the crying and violent protesting.
My plan was to keep the early morning feed for last, but I am worried I might have to go cold turkey.
I am due to start back at work next week, part time. Do you guys think this would be a natural time for her to self-wean or am I going to have to get tough and say no. Or has anyone just carried on nursing while they're about?
I do feel a lot of pressure from others (my mum, who finds it repellent that I am still feeding her) to stop. But I am also feeling pretty drained now - maybe just because it is such a fight every time?

She seems to hate cows milk BTW

I expressed for my DC while at work, but I stopped expressing at around 11/12 months and just fed them when I was at home.

They seemed to adapt fine to this, even if they had extra feeds at weekends etc.

My oldest wasn't fussed for cow's milk, my youngest quite likes it.

My Mum and MIL both were quite against feeding older babies/toddlers, but it worked for us.

So what do you prefer to do, stop or continue the occasional feeds? :)

Why do you want to stop bf? Is it just because of other people's opinions?

I work part time, don't express at work (went back when DS was 13 months and never expressed) and just breastfeed when I'm home.
I can't advise on weaning as I've not done it yet, but don't feel pressured either way. When you decide to wean is up to you and your baby, no one else.

If you want to keep on feeding her, just do it. At that age you can feed her first thing before you go to work and in the evening before bed and she can have a cup of formula or ebm during the day. It will probably help to reassure and comfort her when you get home and tbh I think it would be a bad time to stop as she will already be getting used to a big change if you are going back to work. Stopping bf as well may be too much for her. My mum was a bit at how long I bf mine for but when she realised how happy it made me and my dcs she came round.