Traditional suit for a business event

[NeedToChangeName]

I need to wear a suit for a traditional business event. I've bought from Next / M&S in the past, but couldn't see anything that caught my eye. Any suggestions of where to buy?

Jacket and trousers. Black or navy blue. Hoping for simple / traditional style but not frumpy

Grateful for any suggestions. Thanks

Hobbs might be worth a try

Ladies suits were always hard to find pre-covid and now are worn by so few it'll be tricky but Hobba is probably your best bet

Uniqlo
massimo dutti
Ted baker
mint velvet

Also Reiss