Comment by ascorbic
I've only been once, but I highly recommend Blue Dot Festival, which is a music and science festival held at Jodrell Bank. On the one hand it's a classic UK music festival, but alongside the usual stalls selling Peruvian hats and vegan wraps there are lots of stalls with grad students sharing cool stuff that they're working on. Like the best festivals it's good for kids but also good for all night drum and bass sessions. https://discoverthebluedot.com/