Funeral outfit help please

[ChatHRT]

I need to find something to wear to a funeral next week. Smart, but not all black.
i wear jeans and t shirts for work, so have nothing smart except a couple of evening dresses and jumpsuits
I am 5”7 and a 10 but sometimes 12 due to 30g boobs and a menopausal tummy.
I would love to find wide leg trousers and a shirt - I am not good in ‘pretty’ stuff, I am better in tailored things, but not too harsh.
i always struggle with tops. Love the idea of shirts, but find them too structured sometimes. Would probably need a jacket or something over the top in case of cooler weather
Budget- Vinted or sales ideally as I won’t be able to wear it too often! But £150’is achievable
if the trousers were black I could wear them to work as a change from jeans.
please help me with some ideas!

Hoping this link works - maybe these Cos trousers ‘fluid wrap top’ if the link doesn’t do it, on sale?
www.cos.com/en-gb/women/womenswear/trousers/product/fluid-wrap-front-trousers-black-1292086001?utm_source=Skimlinks.com&utm_medium=affiliate&utm_campaign=1&utm_content=10&utm_term=1786517&ranMID=47832&ranEAID=TnL5HPStwNw&ranSiteID=TnL5HPStwNw-7yo87ppqz2gXrQH2lqEeqA

Thank you @PermanentTemporary, but I fear the trousers would highlight my tummy.