I've just checked in the current issue of Astronomy Now - during the big storm of April 6th, someone took good photographs in Leeds (Yorkshire, not Kent) and another in Stoke-on-Trent. It was also seen in Florida.

http://www.go2net.org/

http://www.go2net.org/cur/aurora.html

http://www.ips.gov.au/asfc/current/geomagnetic.html#geofor

http://www.sel.noaa.gov/pmap/pmapN.html

Some useful sites re predictions etc.

Penny