juris says the next of kin must be involved to the ‘extent necessary to safeguard their interests’ (edwards v UK) but it has not been fleshed out a great deal in the jurisprudence. some cases where relatives have been frozen out challenging authorities e.g. janowiec v russia + finogenov v russia

Cheers thanks for that. I know some of the basics around Article 2, but until Colin mentioned it, I had not thought of thresholds about involvement as it is not my main area of knowledge.