This is a sequence of photos of the same buds from sighting 4386676. The dates taken are 11 August, 5 August, 30 July and 22 July. I originally thought they were Corysanthes incurva, but, Matt and Tobias were correct in suggesting they were more likely to be Corsyanthes grumula. They are still not quite open, but lockdown may prevent me getting out to see them fully open.
Nice sequence of photos. I think you would now agree with Matt and Tobias. The teeth on the labellum edge are C. grumula, C. incurva labellum edge is different.