As far as I am aware the following rallies are happening, but it is always worth confirming with the organisers before travelling any distance. All are on Sunday April 24th.
Cambridge repeater Group Rally, Foxton near Cambridge. rally2022@cambridgerepeaters.net
Northern Amateur Radio Societies Association, Norbeck Castle Exhibition Centre, Blackpool. dwilson@btinternet.com
Andover Radio Club Spring Boot Sale Wildhem Villlage Hall (just north of Andover) arac@arac.org.uk .