Well to be honest it was your other half who I had a slight twinge of recognition of. You were obscured by him until you got off. The fact you got off at Forest Hill increased my suspicions (I wasnāt eavesdropping enough to ascertain if you were talking about gear ratios the whole trip which would obviously have sealed it).
Plus it was late, you two were getting off the train anyway and Iām not prepared to admit to my TV quite how much time I spend burbling on this site.