I well remember an old and hairy ground instructor's reaction to "High key" Low key", having had several engine failures himself on singles , including with the J.P.
His method, from medium altitude, was to head for the overhead of the nearest R.A.F. Airfield ,broadcasting his intentions and getting the circuit cleared. Then spiral down until by aspect it was comfortable to get on to one of the runways and then deadstick well in.
He admitted having a dilemma on one occasion as whether to go for Cranwell or Barkston. He chose the latter:
"Since that was where I'd left my bike"
Of course finding an RAF Airfield now is a bit more difficult..........