[Closed] What clothing for...

Aintree/grand national?
Going down this weekend for a stag do, we're wearing kilts and boots but have been told to wear a collared shirt or polo top.. Been told a rugby top would be ok but I don't have any of those.
I do have a plainish sorta trendy polo shirt (summery type thing from high street) to wear..
We're not going into anywhere exclusive but worried cos its my mates stag do and being skint I can't really go out and buy new clobber for a stag weekend! Having to buy new shoes and jeans as it is.
We're going into the Irish village on friday and gem admission on sat but slightly concerned that I might cause probs dress code wise one we'll get there!
Anyone been before and able to advise at all?
Ta.