How can "turn left heading 180" repeat "turn left heading 180" POSSIBLY be taken as an instruction to climb to anyone with even the most rudimentary of aviation English. The desk-bounds at NATS and CAA are suffering from the same fantastical 'what if in the most infinitessimally, astronomically remote chance' mentality that the beaurocrats at the DfT who fantasise about 'security' are afflicted with.
'Turn left - turn right' - your not going to turn in radians, fathoms, millibars or even the ridiculous hectopascals but in DEGREES, the same DEGREES that pilots and controllers use from day one of training throughout the known universe - so save some breath and concentrate on the important things: pilots-flying and navigating and controllers - keeping aforementioned safe and apart. We all carry licences that purport that we are all qualified to do what we are doiung so just get on with it.