what to wear to a formal interview in this weather?

[AdviceNeeded12345]

Hi - would normally where a dress/jacket combination. I can't seem to find any in at the moment? any ideas please? want to look smart nit sweaty!!

No advice but empathy !
Am in the same boat and travelling about three hours to and across London !
I have got a couple of smart dresses that I think are formal enough without a jacket but will I need tights and court shoes or would sandals be ok.
It's a minefield as until you work for a company you can't predict these subtle rules

Wear your smart dress and jacket.

Carry the jacket when you travel and put it on before you go into office. Most offices are air conditioned so shouldn't be an issue.

Linen dress and flip flops to the place.

Then court shoes and jacket on upon entry.

Depend on the AC and follow the advice above.