Am I breaking the fashion rules of weddings

You can wear a cream top with trousers, I'd say that's fine. As long as you don't look bridal, you'll be fine.

As long as you don’t turn up in a floor length ivory satin gown you’re pretty much ok.

Your outfit sounds fine.

I wouldn’t wear t shirt to a wedding whatever the colour

Depends on the wedding but I wouldn't wear a t-shirt either.

The only rules you must strictly adhere to are 1) don't wear anything that looks like the bride's outfit and 2) don't wear anything that could could get mistaken for as the bride's outfit.

After the above, anything else is a matter of taste and personal style.

Sounds fine... I wore cream trousers and a cream waistcoat, black and cream jacket and hat to a friends wedding and no one batted an eyelid

I’d say that’s fine, I’d never where a white/ cream dress, but most men wear white shirts to weddings.

How long is long-line exactly OP? If its a type of tunic style and satin as well, I would personally wear something else.

I think that sounds fine.

I wouldn’t wear a cream / white dress to a wedding and to be on the safe side I also steer clear of anything with a cream / white base, even if it’s covered in a different coloured pattern.

But trousers and T-shirt are so far removed from “bride territory” I think that’s fine.

Missing a full stop there^^. Hopefully you can decipher it.

Oh no, I was actually right the first time! Ignore me. I’m very tired today.

Totally fine

As long as you don't wear a floor length ivory/cream/white dress whilst holding a bouquet or black with face veil you'll be fine

I wouldn’t op and I wouldn’t have liked it at my wedding but I always get out voted on these threads. As a guest, I’d always err on the side of caution personally.

No one will mistake that outfit for the bride's - I wouldn't bat an eyelid to see a wedding guest wearing that.

So you're wearing a cream top & checked trousers?

Yeah, you're going to so much like you're pretending to be the bride, Op

Can you pop a naice patterned scarf around your shoulders for the ceremony and pics? Will break up the cream somewhat.

I think it sounds fine. Can you link to it?

Its fine - its head to toe black white or cream that would be bad form.

It sounds lovely and perfectly fine keep with that

Neither of your outfits are wedding appropriate in my opinion.

I personally don't wear anything white or cream to weddings because there are so many other colours to choose from - it's the bride's privilege to wear white on the day, give her that respect.