I went to Penzance to watch the total eclipse of the sun in 1999. Guess what, it was cloudy, though the couple of minutes of eerie darkness was memorable enough.
It was a similar story for me. My aunt lives on the Devon and Cornwall border. Unfortunately it was cloudy but it did go dark.
The one in August this year will pass over western Iceland and northern Spain.
Spain is quite lucky because there is another total solar eclipse there next year. This time it will be in the south. I have thought about going to Cadiz (one of my favourite places) to view the spectacle but I expect it will ridiculously expensive. Gibraltar is in the totality zone as well and is no doubt already counting the fortune it is going to make from the mass influx of tourists.