Turbulence in the lee of the Rock can be almost unmamageable in light aircraft, so it might be best to plan a downwind landing if the wind is from about 100 to 260 deg. eg south westerly 15 kts you get a severe downdraught at 3/4 mile from touchdown, so you apply power to get through it without undershooting; just as this takes effect you hit the updraft just inside 1/2 mile and you have to cut the power and stuff the nose down!! AERAD used to do a 'pictorial' plate of wind effects, don't know if they still do though as the company has changed hands several times.