As a mere Glasshopper-in-training I would not dare to seem to imply knowledge of Keith's encyclopedic noggin. I struggle to keep up with the pocket notebook shedding pages behind my own glasses. Especially as Keith may have played with them during his Welsh sojourns.
With new hindsight the lights thing seems to apply to the 13 too but I had not thought of them. Seems we sold them to the French and Israeli Air Forces. I suppose De Gaulle conk jokes may be out of order............