I've checked tomorrow's weather forecast for Lancaster for the Sungazing event in Williamson's Park. I've used "Clear Outside" which is normally pretty good. The forecast is a mix of 20 - 30 % low cloud and 10- 30 % high cloud with a reasonable westerly breeze. I think this should mean that any cloud which is in the way should be moving quite quickly and we should be able to see sunny spells and broken cloud. The cloud start to build more in the afternoon, so if you're coming along, it might be better conditions in the morning.
I'll be there from about 09:30 to set up, and if it pours down, We'll pack up and leave a note in the Cafe !