TCU and Springheel,, the packed lunch sounds familiar. Coming from south of LHR the Central Area was just too far so for me it was the Cains Lane A30 spot in Bedfont, the next road down to the now well known Myrtle avenue i think. , They were good days for variety and 'surprises' with no ADSB to tell you whats 20 mins out.. A good spot for me too was between the rivers in Stanwell -where I lived- before the Cargo terminal and the mini fuel farm took all the views away -nice in summer , winter with the whole open space of LHR to the North east a little bit more challenging