SOP for Brita...ooops....Thompson is for us to execute an Em. turn that follows the exact same path as the wallasey departure. This ensures that on one engine we have enough power (with reserves) to clear all obstacles in the flightpath using lower power settings at T/O than if we had gone straight ahead towards some sort of obstacle. Ahead to something like 2 miles then left turn onto about 350 dgrees to pick up the 084 radial inbound to wallasey. You can hear captain X telling ATC that he is doing this on the audio/