P116 CEEFAX 116 Thu 23 Jun 20:06/28         Key post office engineers will mount indefinite strikes from Monday as the first shot in their battle to stop the government selling off parts of British Telecom. And the six unions involved in BT will also meet tomorrow to review the whole strategy of their campaign against the revived bill to privatise British Telecom. The acting general secretary of the Post Office Engineering Union, Mr David Norman, said the unions' aim was to protect the customer and to maintain the tradition of a public service.