Several years on and the oval covering the tram's former mammary glands still exists, even after coming out fresh from the life extension project. What I find weird though is the fact that A class trams still have them, particularly the A2 class which were designed with pantographs from the beginning. Why would they retain spare A class aprons when I would imagine the B2 aprons would be identical? Likewise with them not fitting dual headlights to the As unlike the B2s (the only A to have them was 296, although this may no longer be the case with LED headlights being retrofitted to the tram fleet).
Back in the 1980s Z1 67 (which was the test tram of the day) had a custom apron with a flat front (no oval) and modern lights fitted (identical to those on prototype W8 922). 67 was also the first Z to be fitted with a pantograph and a dot-matrix desto, I believe the desto was also fitted before the B2s came out with their own versions in 1988 (which, along with the same aircon units, were also used in the Met's latest MAN buses). Z3 173 also received a similar desto, unless this was the same unit out of 67 when they standardised on the Z1 destos in the 90s.