1. The petitioners in the above two Writ Petitions have initially commenced the service in the Posts & Telegraphs Department (P&T Department) of the Government of India and had applied for appointment as Sub Engineer in the Kerala State Electricity Board through the selection by Kerala Public Service Commission. Upon such selection, they were offered appointment in the Kerala State Electricity Board and they had on their own volition left the service of the P&T Department of the Government of India and had joined the service of Kerala State Electricity Board. It is their case that their prior service in the P&T Department of the Government of India is liable to be counted for the purpose of reckoning pensionable service at the time of their retirement from the Kerala State Electricity Board and also that they are entitled for weightage for this prior service, for regulating their pay, in terms of the long time settlement arrived at by the Kerala State Electricity Board with effect from 8.2.1995. The respondent-Electricity Board objects to the grant of such relief on the ground that the petitioners had failed to produce relevant documents and materials from the P&T Depart