EUROCAE: Technical committees covering wide range of topics within the aerospace sector (WG31: Lightning)
http://www.eurocae.org/
ICOLSE: International Conference on Lightning and Static Electricity
http://www.icolse.org/
University of Manchester: 2MV High Voltage facility
http://www.eee.manchester.ac.uk/research/groups/eeps/research/hvpsp/
NaREC/Clothier Lab: High Voltage test facility
http://www.narec.co.uk/sectors/electrical_networks/high_voltage_testing/hv_labs/
Current Lightning Report for the UK
www.nowcast.co.uk