I nearly missed this myself. Tomorrow from roughly midday to early evening UK time, mercury will be moving in front of the sun. You can look up safe ways to observe this if you don't already. I stupidly am on work travel but did pack a camera with solar filter so will aim to stop somewhere and catch this. There is looking like a chance I'll get home early, in which case I can pull out more serious scopes. Weather forecast doesn't look bad where I'm working but looks worse closer to home...