The call Peter Rogers, chief executive of Babcock International, had been waiting for during the past six weeks finally came on Monday at about 6pm. It was Paul Lester, his counterpart at VT Group, ringing to tell him he had a deal. Babcock announced on Tuesday that it was buying its rival for £1.32bn ($1.98bn), offering 361.6p in cash and 0.701 Babcock shares for each VT share. Shares in Babcock rose 5.2…